You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-ethyl-3-[1-(2-methylprop-2-enyl)piperidin-4-yl]-2-[2-(3-methylpyridin-4-yl)ethyl]guanidine;hydroiodide into molecular formula.
user
C20H34IN5
assistant