You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3aS,8aR)-2,3,3a,4,5,7,8,8a-octahydro-1H-pyrrolo[3,4-d]azepin-6-yl]-(2,5-dimethoxyphenyl)methanone;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H25ClN2O3
assistant