You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-O-tert-butyl 2-O-[2-oxo-2-(8-oxo-5,9,10,11-tetrahydronaphtho[2,3-c]isochromen-3-yl)ethyl] 4-methylpyrrolidine-1,2-dicarboxylate by IUPAC nomenclature, provide its molecular formula.
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C30H33NO7
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