You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[[3-(3-chlorophenyl)-1,2,4-oxadiazol-5-yl]methyl]-2-methyl-3-[[4-(trifluoromethyl)phenyl]methyl]guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H18ClF3IN5O
assistant