You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-(2,4-dimethylphenyl)-2-[6-[[(2S)-2-methyl-2,3-dihydroindol-1-yl]methyl]-4-oxopyran-3-yl]oxyacetamide by IUPAC nomenclature, provide its molecular formula.
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C25H26N2O4
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