You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4E)-5-(3,4-dimethoxyphenyl)-4-[hydroxy-(4-methoxy-2-methylphenyl)methylidene]-1-[(2-methoxyphenyl)methyl]pyrrolidine-2,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H29NO7
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