You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3aR,6aR)-4-[(5,6-dimethylpyridin-3-yl)methyl]-1,2,3,3a,6,6a-hexahydropyrrolo[3,2-b]pyrrol-5-one by IUPAC nomenclature, provide its molecular formula.
user
C14H19N3O
assistant