You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[3-(difluoromethoxy)-4-methoxyphenyl]methyl]-1-ethyl-3-(2-methylpropyl)guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H26F2IN3O2
assistant