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 (3R)-7-(4-cyanophenyl)-N-[2-(2-cyanopyrrolidin-1-yl)-2-oxoethyl]-3-methyl-3H-azepine-5-carboxamide .
user
C22H21N5O2
assistant