You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[(3-fluoro-4-methoxyphenyl)methyl]-2-methyl-3-[[2-(trifluoromethoxy)phenyl]methyl]guanidine;hydroiodide .
user
C18H20F4IN3O2
assistant