You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [4-(4-chloro-1,3-benzothiazol-2-yl)piperazin-1-yl]-(2-phenylquinolin-4-yl)methanone into molecular formula.
user
C27H21ClN4OS
assistant