You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,3aS,6aR)-3-(4-chloro-3-nitrophenyl)-5-(4-chlorophenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H15Cl2N3O5
assistant