You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S,3S)-3-[[2-(difluoromethoxy)-5-nitrophenyl]methyl]-2-phenylpiperidin-1-amine;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22ClF2N3O3
assistant