You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-(2-chloro-6-fluorophenyl)ethyl]-1,2-dimethyl-1-[(1-methylpyrrol-2-yl)methyl]guanidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H22ClFN4
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