You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-(5-chloro-1,3-thiazol-2-yl)-4-methylpiperidin-1-yl]-2-(2-methyl-1,3-thiazol-4-yl)ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H18ClN3OS2
assistant