You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (4E)-5-(3,4-dimethoxyphenyl)-1-(6-ethoxy-1,3-benzothiazol-2-yl)-4-[hydroxy-(3-propoxyphenyl)methylidene]pyrrolidine-2,3-dione by IUPAC nomenclature, provide its molecular formula.
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C31H30N2O7S
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