You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named methyl 2-[(2S)-2-(3,4-dimethoxyphenyl)-3-[hydroxy(phenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]acetate is given. What is its corresponding molecular formula?
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C22H21NO7
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