You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3aS,8aS)-6-phenyl-2,3,3a,4,5,7,8,8a-octahydropyrrolo[2,3-d]azepin-1-yl]-(furan-3-yl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H22N2O2
assistant