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 3-[(2S)-2-(6-chloro-1H-benzimidazol-2-yl)propyl]-4-(2,5-dihydropyrrole-1-carbonyl)benzamide .
user
C22H21ClN4O2
assistant