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 1-benzyl-2-(4-butoxy-3-ethoxyphenyl)-4-hydroxy-3-(7-methoxy-1-benzofuran-2-carbonyl)-2H-pyrrol-5-one is given. What is its corresponding molecular formula?
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C33H33NO7
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