The present invention belongs to the field of
pharmaceutical technology and relates to a novel use of a
multikinase inhibitor. Specifically, it relates to a compound represented by formula (I) for treating
biliary tract cancer, or a pharmaceutically acceptable salt, stereoisomer, or crystalline form thereof, and a
drug composition containing the same. It also relates to a method for treating
biliary tract cancer using the same, a use for treating
biliary tract cancer, and a use in manufacturing a
drug for treating biliary tract cancer. The definitions of each variable in the above formula are as defined in the specification. Research results reveal that a
multikinase inhibitor compound represented by formula (I) or a pharmaceutically acceptable salt, stereoisomer, or crystalline form thereof has a therapeutic role against biliary tract cancer, and is considered to have very great potential for clinical application, particularly as it has a significant therapeutic role against cholangiocarcinoma.