You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(2-benzylsulfinylethyl)-2-methyl-3-[3-(4-methylpiperidin-1-yl)propyl]guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H35IN4OS
assistant