You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(4-chloro-1-methylpyrrol-2-yl)methyl]-3-[[1-(3-methoxyphenyl)pyrrolidin-3-yl]methyl]-1,2-dimethylguanidine is the IUPAC name of a molecule. Please give its molecular formula.
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