You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(1,3-benzothiazol-2-yl)piperidin-1-yl]-1-[4-(thiophen-3-ylmethyl)piperazin-1-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H28N4OS2
assistant