You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-chloro-3-cyano-N-[2-(methanesulfonamido)-4-(4-methylpiperazin-1-yl)phenyl]benzenesulfonamide ?
user
C19H22ClN5O4S2
assistant