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 1-[(4-chloro-1-methylpyrrol-2-yl)methyl]-3-[2-[3-(difluoromethoxy)-4-methoxyphenyl]ethyl]-1,2-dimethylguanidine ?
user
C19H25ClF2N4O2
assistant