You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-pyrrolidin-1-ylethyl 5-methyl-7-(2-oxo-4-phenylmethoxypyridin-1-yl)-3,4-dihydro-1H-pyrido[4,3-b]indole-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C31H34N4O4
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