The following discussion and analysis of our financial condition and results of
operations should be read in conjunction with our condensed financial statements
and related notes included elsewhere in this Quarterly Report on Form 10-Q. Some
of the information contained in this discussion and analysis, including
information with respect to our plans and strategy for our business, include
forward-looking statements that involve risks and uncertainties. Investors in
our securities should review Part II, Item 1A. "Risk Factors" in this Quarterly
Report on Form 10-Q and Part I, Item 1A. "Risk Factors" in our Annual Report on
Form 10-K for the year ended December 31, 2021 for a discussion of important
factors that could cause our actual results to differ materially from the
results described in or implied by the forward-looking statements contained in
the following discussion and analysis.

Overview



We are a pharmaceutical company focused on our investigational drug candidate,
veverimer (also known as TRC101), a non-absorbed, orally-administered polymer
designed to treat metabolic acidosis and slow CKD progression by binding and
removing acid from the gastrointestinal tract. Metabolic acidosis is a serious
condition commonly caused by CKD and is believed to accelerate the progression
of kidney deterioration. It can also lead to bone loss, muscle wasting and
impaired physical function. Metabolic acidosis in patients with CKD is typically
a chronic disease and, as such, requires long-term treatment to mitigate its
deleterious consequences.

Until recently, our primary strategic and operational focus was on completion of
the VALOR-CKD renal outcomes clinical trial (also known as TRCA-303), which was
designed to evaluate veverimer's ability to slow CKD progression in patients
with metabolic acidosis and chronic kidney disease. On October 24, 2022, we
announced that the VALOR-CKD trial did not meet its primary endpoint, which was
defined as the time to the first occurrence of any event in the composite
endpoint of renal death, end-stage renal disease, or ESRD, or a confirmed
greater than or equal to 40% reduction in estimated glomerular filtration rate,
or eGFR, also known as DD40.

On November 2, 2022, we announced that the Company had initiated a review of
strategic alternatives to maximize stakeholder value and engaged professional
advisors, including investment banking and financial advisors, to support this
process. We are considering possible strategic alternatives, including a sale of
the Company or its assets, a merger, reverse merger, wind-down, liquidation and
dissolution or other strategic transaction. On November 8, 2022, we put into
place a reduction in force plan which includes an approximate 57.0% reduction in
workforce in November 2022. We estimate aggregate costs of approximately
$2.0 million, recorded primarily in the fourth quarter of 2022, related to
one-time termination severance payments and other employee-related costs that
will be paid during the fourth quarter of 2022 and the first quarter of 2023.
The estimates of costs that the Company expects to incur in connection with the
reduction in force plan are subject to a number of assumptions and actual
results may differ materially. The Company may also incur additional costs not
currently contemplated due to events that may occur as a result of, or that are
associated with, the workforce reduction.

We expect to devote substantial time and resources to exploring strategic
alternatives in order to maximize stakeholder value, but there can be no
assurance that this strategic alternative review process will result in us
pursuing any transaction or that any transaction, if pursued, will be completed
on attractive terms or at all. Additionally, there can be no assurances that any
particular course of action, business arrangement or transaction, or series of
transactions, will be pursued, successfully consummated or lead to increased
stakeholder value or any value to stockholders.

Veverimer is a non-absorbed, low-swelling, spherical polymer bead that is
approximately 100 micrometers in diameter. It is a single, high molecular
weight, crosslinked polyamine molecule. The size of veverimer prevents systemic
absorption from the GI tract. The high degree of cross-linking within veverimer
limits swelling and the overall volume in the GI tract, with the goal of
facilitating good GI tolerability. The high amine content of veverimer provides
proton binding capacity of approximately 10 mEq/gram of polymer. The size
exclusion built into the three-dimensional structure of the polymer enables
preferential binding of chloride versus larger inorganic and organic anions,
including phosphate, citrate, fatty acids and bile acids. This size exclusion
mechanism allows a majority of the binding capacity to be used for hydrochloric
acid binding.

Veverimer is an in-house discovered, new chemical entity. We have a broad intellectual property estate that we believe will provide patent protection for veverimer through 2038 in the United States, at least 2037 in Japan, at


                                       15

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least 2035 in Australia, China, Europe, Hong Kong, Israel, Mexico and Russia, and at least 2034 in South Korea and certain other markets.

Veverimer drug substance manufacturing is conducted for us by Patheon Austria GmbH & Co KG, or Patheon, in their Linz, Austria facility.



We have no products approved for marketing, and we have not generated any
revenue from product sales or other arrangements. From our inception in 2013
through September 30, 2022, we have primarily funded our operations through the
sale of $152.4 million of convertible preferred stock, gross proceeds of $255.6
million ($237.7 million, net) from our initial public offering, or IPO, on
July 2, 2018, gross proceeds of $231.8 million ($217.9 million, net) from our
underwritten public offering on April 8, 2019, issuance of $200.0 million
aggregate principal amount of 3.50% convertible senior notes due 2027, or the
Convertible Senior Notes, ($193.3 million, net) on May 22, 2020, gross proceeds
of $42.0 million ($41.5 million, net) from our Registered Direct Equity
Financing on November 15, 2021 and gross borrowings of $75.0 million ($72.1
million, net) under the Loan and Security Agreement, or 2018 Term Loan, entered
into with Hercules Capital Inc., or Hercules, on February 28, 2018. We have
incurred losses in each year since our inception in 2013. Our net losses were
$25.8 million and $39.7 million for the three months ended September 30, 2022
and 2021, respectively, and $83.9 million and $126.6 million for the nine months
ended September 30, 2022 and 2021, respectively. As of September 30, 2022, we
had an accumulated deficit of $882.0 million. Substantially all of our operating
losses resulted from expenses incurred in connection with advancing veverimer
through development activities and general and administrative costs associated
with pre-commercialization activities and administrative functions.

We expect to continue to incur significant expenses and increasing operating
losses for the foreseeable future. Our net losses may fluctuate significantly
from quarter to quarter and year to year. We expect our expenses will continue
in connection with our ongoing activities as we:

•explore strategic alternatives related to veverimer;

•maintain, expand and protect our intellectual property portfolio; and

•maintain operational, financial and management information systems to support ongoing operations, including operating as a public company.



Our failure to successfully implement a strategic alternative would have a
negative impact on our financial condition. We believe that our existing cash,
cash equivalents and investments are not likely to be sufficient to fund our
operations through the second quarter of 2023.

Components of Our Results of Operations



As discussed above, on November 8, 2022, we put into place a reduction in force
plan which includes an approximate 57.0% reduction in workforce in November
2022. We estimate aggregate costs of approximately $2.0 million, recorded
primarily in the fourth quarter of 2022, related to one-time termination
severance payments and other employee-related costs that will be paid during the
fourth quarter of 2022 and the first quarter of 2023. Expenses related to the
reduction in force will be recorded in operating expenses as part of research
and development expense and general and administrative expense as appropriate.

Research and Development Expense



Research and development expense consists primarily of costs associated with the
development of veverimer and includes salaries, bonuses, benefits, travel and
other related costs, including stock-based compensation expense, for personnel
engaged in research and development functions; expenses incurred under
agreements with clinical research organizations, or CROs, investigative sites
and consultants that conduct our nonclinical and clinical studies; manufacturing
processes optimization and the cost of manufacturing drug substance for
commercial and clinical use; payments to consultants engaged in the development
of veverimer, including stock-based compensation, travel and other expenses;
costs related to compliance with quality and regulatory requirements; research
and development facility-related expenses, which include direct and allocated
expenses, and other related costs. Research and development expense is charged
to operations as incurred when these expenditures relate to our research and
development efforts and have no alternative future uses. Payments made prior to
the receipt of goods or services to be used in research and development are
capitalized until the goods or services are received.


                                       16

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All of our research and development expense to date has been incurred in
connection with veverimer. The process of conducting clinical studies necessary
to obtain regulatory approval is costly and time consuming and the continued
development, if any, of veverimer is uncertain. As a result, we are unable to
determine the duration and completion costs of our research and development
projects or when, and to what extent, we will generate stakeholder return from
strategic alternatives related to veverimer. Therefore, we are unable to
estimate with any certainty the costs we will incur as we explore strategic
alternatives related to veverimer. We continue to evaluate all potential
strategic options for the Company, including a sale of the Company or its
assets, a merger, reverse merger, wind-down, liquidation and dissolution or
other strategic transaction but we may never succeed in recognizing value from
our research and development efforts.

General and Administrative Expense



General and administrative expense consists primarily of salaries, bonuses,
benefits, travel, stock-based compensation expense and facility-related expenses
for personnel in finance and administrative functions. General and
administrative expense also includes professional fees for legal, patent,
consulting, accounting and audit services, pre-commercial preparation, medical
affairs costs and recruiting services for the potential launch of veverimer and
other related costs.

Results of Operations

The following table presents our results of operations for the three and nine months ended September 30, 2022 and 2021.


                                              Three Months Ended                                                         Nine Months Ended
                                                 September 30,                          Change                             September 30,                         Change
(in thousands)                              2022               2021                $               %               2022               2021                 $                 %
Operating expenses:
Research and development                $  19,935          $  26,635          $ (6,700)           (25) %       $  55,298          $   78,591          $ (23,293)            (30) %
General and administrative                  4,125              9,052            (4,927)           (54) %          23,119              28,497             (5,378)            (19) %
Total operating expenses                   24,060             35,687           (11,627)           (33) %          78,417             107,088            (28,671)            (27) %
Loss from operations                      (24,060)           (35,687)           11,627            (33) %         (78,417)           (107,088)            28,671             (27) %

Other income (expense), net                   277                  6               271               N/M             408                 155                253             163  %
Interest expense                           (1,978)            (3,994)            2,016            (50) %          (5,927)            (13,533)             7,606             (56) %
Loss on early extinguishment of
2018 Term Loan                                  -                  -                 -               N/M               -              (6,124)             6,124            (100) %

Net loss                                $ (25,761)         $ (39,675)         $ 13,914            (35) %       $ (83,936)         $ (126,590)         $  42,654             (34) %


N/M = Not meaningful

Research and Development Expense

The following table presents our research and development expense for the three months ended September 30, 2022 and 2021.


                                                Three Months Ended
                                                  September 30,                  Change
(in thousands)                                  2022           2021           $            %
Clinical development costs                  $   18,062      $ 20,060      $ (1,998)      (10) %
Personnel and related costs                        636         2,880        (2,244)      (78) %
Stock-based compensation expense                   339         2,819        (2,480)      (88) %
Other research and development costs               898           876        

22 3 % Total research and development expense $ 19,935 $ 26,635 $ (6,700) (25) %





                                       17

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Research and development expense was $19.9 million and $26.6 million for the
three months ended September 30, 2022 and 2021, respectively. The decrease of
$6.7 million was primarily due to decreased activities in connection with our
veverimer clinical development program, resulting in a decrease in clinical
development costs of $2.0 million related to drug substance manufacturing costs
and other clinical trial costs related to our VALOR-CKD trial following the
administrative stop announced in May 2022, a decrease in personnel and related
costs of $2.2 million related to lower bonus expense and a decrease in
stock-based compensation expense of $2.5 million related to performance awards.

The following table presents our research and development expense for the nine months ended September 30, 2022 and 2021.


                                                Nine Months Ended
                                                  September 30,                  Change
(in thousands)                                 2022           2021            $            %
Clinical development costs                  $  39,977      $ 58,855      $ (18,878)      (32) %
Personnel and related costs                     6,462         9,160         (2,698)      (29) %
Stock-based compensation expense                6,132         7,948         (1,816)      (23) %
Other research and development costs            2,727         2,628         

99 4 % Total research and development expense $ 55,298 $ 78,591 $ (23,293) (30) %




Research and development expense was $55.3 million and $78.6 million for the
nine months ended September 30, 2022 and 2021, respectively. The decrease of
$23.3 million was primarily due to decreased activities in connection with our
veverimer clinical development program, resulting in a decrease of clinical
development costs of $18.9 million related to drug substance manufacturing costs
and other clinical trial costs related to our VALOR-CKD trial following the
administrative stop announced in May 2022, a decrease in personnel and related
costs of $2.7 million related to lower bonus expense and a decrease in
stock-based compensation expense of $1.8 million primarily related to
performance awards and awards fully vested in 2021.

General and Administrative Expense

The following table presents our general and administrative expense for the three months ended September 30, 2022 and 2021.


                                                   Three Months Ended
                                                      September 30,                   Change
(in thousands)                                      2022            2021           $            %
Personnel and related costs                   $      442          $ 2,255      $ (1,813)      (80) %
Stock-based compensation expense                     448            3,830        (3,382)      (88) %
Other general and administrative costs             3,235            2,967           268         9  %
Total general and administrative expense      $    4,125          $ 9,052

$ (4,927) (54) %




General and administrative expense was $4.1 million and $9.1 million for the
three months ended September 30, 2022 and 2021, respectively. The decrease of
$4.9 million was primarily due to a decrease in personnel and related costs of
$1.8 million due to lower bonus expense and a decrease in stock-compensation
expense of $3.4 million related to performance awards, partially offset by an
increase in other general and administrative costs of $0.3 million related to
pre-commercialization activities, partially offset by a reduction in legal
costs.

The following table presents our general and administrative expense for the nine months ended September 30, 2022 and 2021.



                                                  Nine Months Ended
                                                    September 30,                 Change
(in thousands)                                   2022           2021           $            %
Personnel and related costs                   $   5,119      $  7,097      $ (1,978)      (28) %
Stock-based compensation expense                  8,250        11,352        (3,102)      (27) %
Other general and administrative costs            9,750        10,048       

(298) (3) % Total general and administrative expense $ 23,119 $ 28,497 $ (5,378) (19) %





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General and administrative expense was $23.1 million and $28.5 million for the
nine months ended September 30, 2022 and 2021, respectively. The decrease of
$5.4 million was primarily due to a decrease in personnel and related costs of
$2.0 million due to lower bonus expense, a decrease in stock-compensation
expense of $3.1 million related to performance awards and a decrease in other
general and administrative costs of $0.3 million, primarily related to a
reduction in legal and finance costs, partially offset by an increase in
pre-commercialization costs.

Non-Operating Income (Expense)

The following table presents our non-operating income (expense) for the three months ended September 30, 2022 and 2021.



                                           Three Months Ended
                                             September 30,                       Change
(in thousands)                             2022                 2021          $           %
Other income (expense), net      $        277                $      6      $  271          N/M
Interest expense                       (1,978)                 (3,994)      2,016       (50) %


N/M = Not meaningful

Other income (expense), net increased by $0.3 million for the three months ended
September 30, 2022, due primarily to higher interest income from investments.
Interest expense decreased $2.0 million for the three months ended September 30,
2022, due the effect of the adoption ASU No. 2020-06, Debt - Debt with
Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging -
Contracts in Entity's Own Equity (Subtopic 815-40), or ASU 2020-06, on January
1, 2022, which resulted in reduced non-cash interest expense previously
associated with the equity component of the Convertible Senior Notes.

The following table presents our non-operating income (expense) for the nine months ended September 30, 2022 and 2021.



                                                                  Nine Months Ended
                                                                    September 30,                          Change
(in thousands)                                                 2022               2021               $                %
Other income (expense), net                                $     408          $     155          $   253              163  %
Interest expense                                              (5,927)           (13,533)           7,606              (56) %
Loss on early extinguishment of 2018 Term Loan                     -             (6,124)           6,124             (100) %


Other income (expense), net increased by $0.3 million for the nine months ended
September 30, 2022, due to foreign exchange losses on payments made in 2021 and
an increase in interest income from investments, partially offset by changes in
compound derivative liability. Interest expense decreased $7.6 million for the
nine months ended September 30, 2022, due the effect of the adoption ASU No.
2020-06 on January 1, 2022, which resulted in reduced non-cash interest expense
previously associated with the equity component of the Convertible Senior Notes
and the repayment of the 2018 Term Loan in March 2021. The loss on early
extinguishment of 2018 Term Loan of $6.1 million was recognized in March 2021 on
repayment of the 2018 Term Loan.

Liquidity and Capital Resources

Sources of Liquidity



From our inception in 2013 through September 30, 2022, we have primarily funded
our operations through the sale of $152.4 million of convertible preferred
stock, gross proceeds of $255.6 million ($237.7 million, net) from our IPO on
July 2, 2018, gross proceeds of $231.8 million ($217.9 million, net) from our
underwritten public offering on April 8, 2019, issuance of $200.0 million
Convertible Senior Notes ($193.3 million, net) on May 22, 2020, gross proceeds
of $42.0 million ($41.5 million, net) from our Registered Direct Equity
Financing on November 15, 2021 and gross borrowings of $75.0 million ($72.1
million, net) under the 2018 Term Loan entered into with Hercules on
February 28, 2018. As of September 30, 2022, we had cash, cash equivalents and
investments of $80.2 million.

We believe that our cash, cash equivalents and investments of $80.2 million as
of September 30, 2022, will allow us to continue funding our operations through
the first quarter of 2023. As discussed above, on November 8, 2022, we put into
place a reduction in force plan which includes an approximate 57.0% reduction in
workforce in


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November 2022. We estimate aggregate costs of approximately $2.0 million, recorded primarily in the fourth quarter of 2022, related to one-time termination severance payments and other employee-related costs that will be paid during the fourth quarter of 2022 and the first quarter of 2023.

Convertible Senior Notes



On May 22, 2020, we issued $200.0 million aggregate principal amount of
Convertible Senior Notes pursuant to an indenture, dated as of May 22, 2020, or
the Indenture, between us and U.S. Bank National Association, as trustee. Net
proceeds from the offering were $193.3 million after deducting underwriting
discounts, commissions and other offering costs of approximately $6.7 million.

Our Convertible Senior Notes are senior unsecured obligations, and interest is
payable semi-annually in arrears at a rate of 3.5% per year on May 15 and
November 15 of each year, beginning on November 15, 2020. The Convertible Senior
Notes mature on May 15, 2027, unless earlier repurchased, redeemed or converted
and are not redeemable prior to May 20, 2024. We may redeem for cash all or any
portion of the Convertible Senior Notes, at our option, on or after May 20, 2024
and on or before the 40th scheduled trading day immediately prior to the
maturity date, if the last reported sale price of our common stock has been at
least 130% of the conversion price then in effect for at least 20 trading days
(whether or not consecutive), including the trading day immediately preceding
the date on which we provide notice of redemption, during any 30 consecutive
trading day period ending on, and including, the trading day immediately
preceding the date on which we provide notice of redemption at a redemption
price equal to 100% of the principal amount of the Convertible Senior Notes to
be redeemed, plus accrued and unpaid interest to, but excluding, the redemption
date. We are not required to provide and no sinking fund is provided for the
Convertible Senior Notes.

The Convertible Senior Notes are convertible into cash, shares of our common
stock or a combination of cash and shares of our common stock at our election at
an initial conversion rate of 30.0978 shares of our common stock per $1,000
principal amount of the Convertible Senior Notes, which is equivalent to an
initial conversion price of approximately $33.23 per share of our common stock.
The conversion rate is subject to customary adjustments for certain events as
described in the Indenture. As of September 30, 2022, the "if-converted value"
did not exceed the remaining principal amount of the Convertible Senior Notes.

Registered Direct Equity Financing



On November 15, 2021, we consummated a registered direct equity financing
pursuant to which we sold an aggregate of 4,666,667 shares of our common stock,
pre-funded warrants to purchase up to 2,333,333 shares of our common stock and
common warrants to purchase up to 7,000,000 shares of our common stock. Each
share of common stock and accompanying common warrant and each pre-funded
warrant and accompanying common warrant were sold together at a combined
offering price of $6.00. The pre-funded warrants were immediately exercisable at
a nominal exercise price of $0.001. The common warrants are exercisable at an
exercise price of $11.00 on or after May 15, 2022. Net proceeds were
approximately $41.5 million, after deducting offering costs of $0.5 million.

The pre-funded warrants were exercised in full on October 24, 2022. The common
warrants are exercisable until the earliest of: (a) November 15, 2024, (b)
immediately prior to the closing of certain fundamental transactions or (c) five
business days after written notice following the earliest of: (i) submission of
the New Drug Application for veverimer with the U.S. Food and Drug
Administration, or (ii) the date that both of the following have occurred: (x)
six weeks following the issuance of a press release reporting the results of the
primary analysis of the VALOR-CKD trial and (y) one of the following: (aa) the
completion of a common stock financing resulting in not less than $75.0 million
in gross proceeds at an offering price of not less than $13.50 per share, or
(bb) the volume weighted average share price of our common stock is greater than
$15.00 per share with certain multiple-day trading volume requirements.

Funding Requirements



We have incurred losses and negative cash flows from operations since our
inception in 2013 and anticipate that we will continue to incur net losses for
the foreseeable future. As of September 30, 2022, we had an accumulated deficit
of $882.0 million. Existing cash, cash equivalents and investments are not
likely to be sufficient to fund our operations through the second quarter of
2023 as we expect to incur additional losses in the future.

Such future capital requirements are difficult to forecast and will depend on many factors, including:




                                       20

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•the cost related to maintaining operational, financial and management information systems to support ongoing operations, including operating as a public company;

•the cost related to exploring strategic alternatives related to veverimer;

•the cost associated with any wind-down, liquidation, dissolution or other strategic transaction;

•our ability to maintain and enforce our intellectual property rights and defend any intellectual property-related claims;

•the cost of servicing our Convertible Senior Notes; and

•the cost of fulfilling our minimum contractual obligations to our suppliers and vendors.



To the extent that we raise additional capital through the sale of equity or
convertible debt securities, the ownership interest of our stockholders will be
or could be diluted, and the terms of these securities may include liquidation
or other preferences that adversely affect the rights of our common
stockholders. If we raise additional funds through collaborations, strategic
partnerships or licensing arrangements with third parties, we may have to
relinquish valuable rights to veverimer, associated intellectual property, our
other technologies, future revenue streams or research programs or grant
licenses on terms that may not be favorable to us.

We expect to fund current operations out of cash on hand. There can be no
assurance that we will be successful in securing additional funding at levels
sufficient to fund our operations or on terms acceptable to us. If we are
unsuccessful in our efforts to raise additional financing, we could be required
to significantly reduce and delay operating expenses, out-license intellectual
property rights to our investigational drug candidates and sell unsecured
assets, cease operations altogether or a combination of the above, any of which
may have a material adverse effect on our business, results of operations,
financial condition and/or our ability to fund our scheduled obligations on a
timely basis or at all.

Cash Flows

The following table presents a summary of the net cash flow activity for the nine months ended September 30, 2022 and 2021.


                                                     Nine Months Ended
                                                       September 30,
(in thousands)                                     2022            2021
Net cash provided by (used in):
Operating activities                            $ (70,731)     $ (101,996)
Investing activities                               66,860          63,988
Financing activities                                  502         (82,861)

Net decrease in cash and cash equivalents $ (3,369) $ (120,869)

Cash Used in Operating Activities



During the nine months ended September 30, 2022, cash used in operating
activities was $70.7 million, which consisted of a net loss of $83.9 million,
adjusted by non-cash charges of $15.0 million and changes in cash used in
operating assets and liabilities of $1.8 million. Non-cash charges consisted
primarily of stock-based compensation of $14.4 million, accretion of Convertible
Senior Notes of $0.7 million and depreciation and amortization of $0.2 million,
partially offset by net amortization of premiums and discounts on investments of
$0.2 million. The changes in cash used in our operating assets and liabilities
were primarily due to a decrease in accounts payable of $5.6 million, partially
offset by a decrease in prepaid expenses and other assets of $2.7 million and an
increase in accrued expenses and other liabilities of $1.1 million.

During the nine months ended September 30, 2021, cash used in operating
activities was $102.0 million, which consisted of a net loss of $126.6 million,
adjusted by non-cash charges of $33.6 million and changes in cash used in our
operating assets and liabilities of $9.0 million. The non-cash charges consisted
primarily of stock-based compensation of $19.3 million, accretion of Convertible
Senior Notes and 2018 Term Loan of $7.0 million, loss on early extinguishment of
2018 Term Loan of $6.1 million, non-cash operating lease costs of $0.6 million,
net amortization of premiums and discounts on investments of $0.4 million and
depreciation and amortization of $0.4


                                       21

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million, partially offset by changes in compound derivative liability of $0.2
million. The changes in cash used in our operating assets and liabilities were
primarily due to a decrease in accrued expenses and other liabilities of $8.9
million and a decrease in accounts payable of $0.2 million, partially offset by
a decrease in prepaid expenses and other assets of $0.1 million.

Cash Provided by Investing Activities



Net cash provided by investing activities was $66.9 million and $64.0 million
for the nine months ended September 30, 2022 and 2021, respectively. Net cash
provided by investing activities during the nine months ended September 30, 2022
was due to proceeds from maturities of investments of $142.5 million, partially
offset by purchases of investments of $75.6 million. Net cash provided by
investing activities during the nine months ended September 30, 2021 was due to
proceeds from maturities of investments of $200.4 million, partially offset by
purchases of investments of $136.3 million and purchases of property and
equipment of $0.1 million.

Cash Provided by (Used in) Financing Activities



Net cash provided by financing activities was $0.5 million for the nine months
ended September 30, 2022 and net cash used in financing activities was $82.9
million for the nine months ended September 30, 2021. Net cash provided by
financing activities during the nine months ended September 30, 2022 was
primarily due to proceeds from issuance of common stock under equity incentive
plans of $0.7 million, partially offset by payments for taxes related to net
share settlement of equity awards of $0.2 million. Net cash used in financing
activities during the nine months ended September 30, 2021 was primarily due to
cash paid for early extinguishment of 2018 Term Loan of $83.3 million, partially
offset by proceeds from the issuance of common stock under equity incentive
plans of $0.5 million.

Contractual Obligations and Commitments



We have contractual obligations relating to our manufacturing and service
contracts, Convertible Senior Notes, lease obligations and other research and
development activities. We also enter into other contracts in the normal course
of business with CROs, contract development and manufacturing organizations and
other service providers and vendors. These contracts generally provide for
termination on short notice and are cancelable contracts.

Our existing cash, cash equivalents and investments as of September 30, 2022 are
not likely to be sufficient to meet our contractual obligations through the
second quarter of 2023, as we expect to incur additional losses in the future
due to current contractual obligations and recognize that we will need to raise
additional capital to continue operations.

Critical Accounting Policies and Significant Judgments and Estimates



Our management's discussion and analysis of financial condition and results of
operations is based on our condensed financial statements, which have been
prepared in accordance with generally accepted accounting principles in the
United States. The preparation of these condensed financial statements requires
us to make estimates and assumptions that affect the reported amounts of assets
and liabilities and the disclosure of contingent assets and liabilities as of
the date of the financial statements, as well as the reported expenses during
the reporting periods. These items are monitored and analyzed by us for changes
in facts and circumstances, and material changes in these estimates could occur
in the future. We base our estimates on historical experience and on various
other factors that we believe are reasonable under the circumstances, the
results of which form the basis for making judgments about the carrying value of
assets and liabilities that are not readily apparent from other sources. Changes
in estimates are reflected in reported results for the period in which they
become known. There were no changes in our critical accounting policies and
estimates, as compared to our Annual Report on Form 10-K for the year
ended December 31, 2021, except as described below.

Stock-Based Compensation



Stock-based compensation expense for stock options with performance conditions
is recognized over the estimated service period required to meet
performance-based targets using an accelerated attribution method when achieving
the performance-based targets is deemed probable. When estimating the service
period we make subjective assumptions about the probability and timing of
achieving these performance-based targets. Due to the outcome of the VALOR-CKD
trial, we reassessed the vesting of performance-based awards unvested as of


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September 30, 2022, as improbable of achievement. As a result, we reversed the
related cumulative stock-based compensation expense in the three months ended
September 30, 2022.

Restructuring

On November 8, 2022, we put into place a reduction in force plan which includes
an approximate 57.0% reduction in workforce in the fourth quarter of 2022. We
estimate aggregate costs of approximately $2.0 million, recorded primarily in
the fourth quarter of 2022, related to one-time termination severance payments
and other employee-related costs that will be paid during the fourth quarter of
2022 and the first quarter of 2023. The estimates of costs that we expect to
incur in connection with the reduction in force plan are subject to a number of
assumptions and actual results may differ materially. We may also incur
additional costs not currently contemplated due to events that may occur as a
result of, or that are associated with, the workforce reduction. For example, if
the termination provisions are triggered in our manufacturing agreement with
Patheon, we may become liable for a termination payment. In addition, if we take
steps to terminate or sublease our leased facilities, we may incur a loss on the
exit of the lease. We may also incur impairment charges related to long-lived
assets as well as prepaid and other assets.

Actual results may differ significantly from these estimates under different
assumptions or conditions. For additional information about our critical
accounting estimates refer to Part II, Item 7., "Critical Accounting Policies
and Significant Judgments and Estimates" in our Annual Report on Form 10-K for
the year ended December 31, 2021.

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