You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[hydroxy-(4-methylphenyl)methylidene]-5-(4-methoxyphenyl)-1-(6-methylpyridazin-3-yl)pyrrolidine-2,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H21N3O4
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