You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-chloro-2-methylphenyl)-N-[3-(4-formylpiperazin-1-yl)-3-oxopropyl]methanesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H22ClN3O4S
assistant