You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-3-(3-methylbutan-2-ylamino)-N-[(4-methylpiperidin-4-yl)methyl]benzamide;dihydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H35Cl2N3O
assistant