You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S,3S,10bR)-2-(2,5-dimethoxyphenyl)-3-(4-methoxybenzoyl)spiro[3,10b-dihydro-2H-pyrrolo[2,1-a]phthalazine-1,2'-indene]-1',3'-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C35H28N2O6
assistant