You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (3R,3aR,6aS)-3-(2,4-dimethoxyphenyl)-1-(4-methylbenzoyl)-5-(4-methylphenyl)-2,3,3a,6a-tetrahydropyrrolo[3,4-c]pyrazole-4,6-dione .
user
C28H27N3O5
assistant