You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-benzylidene-N-[(4-methoxyoxan-4-yl)methyl]-N'-methylpiperidine-1-carboximidamide;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H32IN3O2
assistant