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 methyl (1R,3S,3aS,6aS)-3,5-dibenzyl-1-(3-chlorophenyl)-4,6-dioxo-1,2,3a,6a-tetrahydropyrrolo[3,4-c]pyrrole-3-carboxylate .
user
C28H25ClN2O4
assistant