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-[5-[(3-nitrophenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]-4-piperidin-1-ylsulfonylbenzamide .
user
C21H21N5O5S3
assistant