You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-ethyl-2-[2-[ethyl(methyl)amino]ethyl]-1-[(4-methoxyphenyl)methyl]-1-methylguanidine;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C17H31IN4O
assistant