You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4E)-4-[(2,5-dimethylphenyl)-hydroxymethylidene]-1-pentyl-5-(4-propan-2-ylphenyl)pyrrolidine-2,3-dione by IUPAC nomenclature, provide its molecular formula.
user
C27H33NO3
assistant