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 4-[4-[(2-chloropyridin-3-yl)methyl]piperazin-1-yl]-N,N-diethyl-3-nitrobenzenesulfonamide .
user
C20H26ClN5O4S
assistant