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 1-(4-piperidin-1-ylsulfonyl-1,4-diazepan-1-yl)-2-pyridin-3-yl-2-pyrrolidin-1-ylethanone .
user
C21H33N5O3S
assistant