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 3-(4-acetylphenyl)-1-methyl-4-(1H-pyrrolo[2,3-b]pyridin-3-yl)pyrrole-2,5-dione .
user
C20H15N3O3
assistant