You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,3aS,6aS)-5-benzyl-3-(3-nitrophenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H19N3O5
assistant