You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(4aS,7aS)-6-methyl-3,4,4a,5,7,7a-hexahydro-2H-pyrrolo[3,4-b]pyridine-1-carbonyl]-6-propyl-1H-pyridin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H25N3O2
assistant