You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[4-(ethylsulfamoyl)phenyl]methyl]-1-[4-(trifluoromethoxy)phenyl]guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H20F3IN4O3S
assistant