You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (1S,3R,3aR,6aR)-5-(4-fluorophenyl)-1-(2-methylphenyl)-4,6-dioxo-3-phenyl-1,2,3a,6a-tetrahydropyrrolo[3,4-c]pyrrole-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H23FN2O4
assistant