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 (2R)-2-(2,5-dimethoxyphenyl)-3-(furan-2-carbonyl)-4-hydroxy-1-[2-(5-methoxy-1H-indol-3-yl)ethyl]-2H-pyrrol-5-one is given. What is its corresponding molecular formula?
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C28H26N2O7
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