You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-[6-[[(6-chloro-1H-benzimidazol-2-yl)amino]methyl]-3-oxo-1H-isoindol-2-yl]-3-methylpiperidine-2,6-dione ?
user
C22H20ClN5O3
assistant