You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name tert-butyl 3-[(3R,4aS)-7-methyl-10-oxo-4,4a-dihydro-3H-pyrano[4,3-b]chromen-3-yl]indole-1-carboxylate into its molecular formula.
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C26H25NO5
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