You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 2-[C-[1-[(3,4-dichlorophenyl)methyl]-3-(piperidin-1-ylmethyl)pyrrol-2-yl]-N-methylcarbonimidoyl]propanedinitrile ?
user
C22H23Cl2N5
assistant