You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[2-(dimethylamino)-2-(3-fluorophenyl)ethyl]-3-[3-(2-methoxyethoxy)propyl]-2-methylguanidine;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C18H32FIN4O2
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