Study of Fuquinitinib Combined With Capecitabine First-line Maintenance in the Treatment of Metastatic Colorectal Cancer

"Phase Ⅰb dose exploration trial of fuquinitinib combined with capecitabine (n=6-9) :~3\) Capecitabine: 1000 mg/m² orally, twice a day on days 1-21 of each cycle, 28 days for one treatment cycle.~4\) Fuquinitinib: 1 to 21 days per cycle, orally, once a day, 28 days for a treatment cycle. There are two dose gradients of fuquintinib: 2mg/d, and the initial dose of 3mg/d is 2mg/d. According to the 3+3 dose climbing principle, dose exploration is carried out in the order of 2mg/d→3mg/d, as follows:~Phase II: Dose extension trial (n=47) :~The recommended dose of fuquinitinib combined with capecitabine, as determined in phase I b, continued to enroll 47 patients in the dose-expansion phase trial until the patient became intolerant of toxicity or disease progression."