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Name the molecular formula for the molecule established as ethyl (1R,9R)-10-ethyl-11-methyl-9-(2-oxochromen-3-yl)-8-oxa-10-azatricyclo[7.3.1.02,7]trideca-2,4,6,11-tetraene-12-carboxylate using the IUPAC nomenclature.
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C26H25NO5
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