You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(1-benzyl-2-methylpiperidin-4-yl)-2-methyl-3-[2-(3-methylpiperidin-1-yl)ethyl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H40IN5
assistant