A Study of an FGFR2/3 Inhibitor (CGT4859) in Patients With Cholangiocarcinoma and Other Advanced Solid Tumors

Key 1. Histologically confirmed locally advanced, metastatic, and/or unresectable iCCA or other solid tumor with documented FGFR2/3 alteration in blood and/or tumor. 2. Previously treated with, not appropriate for, or declined standard-of-care first-line treatment. 3. Have measurable disease per RECIST v1.1. 4. Eastern Cooperative Oncology Group (ECOG) performance status of 0-1. 5. Have clinically acceptable local laboratory screening results (clinical chemistry and hematology) within certain limits. 6. Resolution of toxicities from prior therapy to ≤Grade 1 (or baseline), including resolution of clinically significant laboratory abnormalities, before the first dose of study drug. Exceptions are alopecia, hypothyroidism, or type 1 diabetes mellitus controlled with medical intervention, and paronychia controlled with local intervention. Key

1. Received chemotherapy or anticancer therapies or radiotherapy within certain timeframes before first dose of study drug. 2. Major surgeries (eg, abdominal laparotomy) within 4 weeks of the first dose of study drug. 3. Clinically significant corneal or retinal disorders or current evidence of retinal detachment. 4. Received more than 2 prior FGFRi therapies 5. Active, symptomatic, or untreated brain metastases unless the participant is clinically stable and off corticosteroids for ≥2 months.