You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-(1-aminoethyl)piperidin-1-yl]-[4-(4-methylphenyl)oxan-4-yl]methanone;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H31ClN2O2
assistant