You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3aS,4R,9aS,9bS)-8-benzoyl-4-(4-bromobenzoyl)-2-(2,3-dihydro-1,4-benzodioxin-6-yl)-3a,4,9a,9b-tetrahydropyrrolo[3,4-a]indolizine-1,3-dione .
user
C32H23BrN2O6
assistant