You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(3-chloro-4-methoxyphenyl)methyl]-1-[(4,5-dimethyl-1,2,4-triazol-3-yl)methyl]-3-(3-methylsulfanylpropyl)guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H28ClIN6OS
assistant