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 (4Z)-1-(3,4-dimethylphenyl)-4-[hydroxy(1H-indol-3-yl)methylidene]-5-pyridin-3-ylpyrrolidine-2,3-dione .
user
C26H21N3O3
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