You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-ethyl-2-[(2-fluorophenyl)methyl]-3-[(2-hydroxy-1-methylcyclohexyl)methyl]guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H29FIN3O
assistant