The goal of this clinical trial is to assess the safety and tolerability of YY2201 in participants with advanced solid tumors. The main questions it aims to answer are:
What medical problems do participants have when taking drug YY2201? What is the maximum tolerated dose (MTD) in patients with advanced solid tumors? What is the anti-tumor efficacy of YY2201 in patients with advanced solid tumors This is a multicenter, open-label, dose-escalation phase I study.
Participants will:
Start to receive multiple doses of YY2201 orally twice daily (approximately 12 h interval) for 3 days followed by 4 days off in a 21-days treatment cycle Perform radiography tumor assessments at screening visit every 2 cycles. Keep a diary of their symptoms.