You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[[C-[4-(3-methoxypropoxy)piperidin-1-yl]-N-methylcarbonimidoyl]amino]propyl]benzamide;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H35IN4O3
assistant