A Study of YL-17231 in Patients With Advanced Solid Tumors

After a screening period of approximately 14 days, eligible patients will receive oral YL-17231 once or twice daily until documented disease progression, unacceptable AEs, intercurrent illness preventing further administrations of study treatment, investigator's decision to withdrawal, the patient's consent of withdrawal, pregnancy, or for administrative reasons. Following the end of treatment, patients will continue to be followed for safety for 30 days. Patients who permanently discontinue study treatment for reasons other than disease progression will have post-treatment follow-up for disease assessment until start of new anticancer treatment, patient's consent of withdrawal, lost to follow-up, death, or until the Sponsor stops the study, whichever comes first.