You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(4-chlorophenyl)methyl]-3-[2-(dimethylamino)-2-(1-methylpyrazol-4-yl)ethyl]-1,2-dimethylguanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H28ClIN6
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