Stemline Therapeutics, Inc. announced that clinical data on felezonexor (SL-801) has been selected for presentation at the upcoming European Society of Medical Oncology (ESMO) Annual Congress 2019 to be held from September 25-30, in Barcelona, Spain. The details of the presentation are outlined below. Interim Results from a Phase 1 Trial of SL-801, a Novel XPO-1 Inhibitor, in Patients with Advanced Solid Tumors Type.