You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 5-O'-benzyl 3-O'-(2-methoxyethyl) (3R)-2'-amino-6'-methyl-2-oxospiro[1H-indole-3,4'-pyran]-3',5'-dicarboxylate into molecular formula.
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C25H24N2O7
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