You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[1-[4-(5-chloro-2-methylphenyl)piperazin-1-yl]-1-oxopropan-2-yl]benzenesulfonamide .
user
C20H24ClN3O3S
assistant