You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(2S)-2-(1,3-benzothiazol-2-yl)piperidin-1-yl]-3-[3-(4-chlorophenyl)-1,2,4-oxadiazol-5-yl]propan-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H21ClN4O2S
assistant