You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-1-[2-(4-methylpiperazin-1-yl)propyl]-3-(2-pyridin-2-ylethyl)guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H31IN6
assistant