You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3aS,7aR)-N-[3-(difluoromethoxy)phenyl]-1,2,3,4,5,6,7,7a-octahydroisoindole-3a-carboxamide;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H21ClF2N2O2
assistant