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 (2'S,3S)-1-[(2,4-difluorophenyl)methyl]-N-(2-methoxyethyl)-N-methylspiro[2H-indole-3,4'-oxolane]-2'-carboxamide into molecular formula.
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C23H26F2N2O3
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