You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(dimethylamino)-2-(4-methylphenyl)ethyl]-2-methyl-3-(7-oxabicyclo[2.2.1]heptan-2-yl)guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H31IN4O
assistant