A Multi-Center, Open-Label Study of Surufatinib (HMPL-012) in Patients With Advanced Solid Tumors

The study is an open-label, dose escalation and expansion clinical trial of surufatinib orally once daily (QD) in patients with advanced solid tumors. The study consists of two phases: Dose escalation phase - A 3+3 design will be used for this portion of the study. * Approximately 15 to 35 evaluable patients will be enrolled. The actual number of patients depends on the Dose-limiting toxicity (DLT) situation as well as the RP2D dose level reached in this trial. * The trial will approximately evaluate five surufatinib dose levels at 50,100, 200, 300 and 400 mg/day. Expansion phase: Approximately 115 patients will be enrolled into one of four open-label treatment arms during this phase: at least 30 patients with advanced BTC that has progressed on standard first-line chemotherapy will be assigned to Arm A, at least 15 patients with advanced pNET that has progressed on either everolimus, sunitinib, or both will be assigned to Arm B, at least 15 patients with advanced EP-NET that has progressed on everolimus will be assigned to Arm C, and at least 45 patients with Soft Tissue Sarcoma will be assigned to Arm D. Subjects enrolled in this phase are to be evaluated for the safety, tolerability and pharmacokinetic (PK) characteristics to confirm the selected surufatinib dose. Subjects will receive surufatinib daily treatment continuously with every 28-day treatment cycle until disease progression, death, or intolerable toxicity at the investigator's discretion for a favorable benefit to risk balance.