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Name the molecular formula for the molecule established as 6-[5-chloro-3-(5H-chromeno[4,3-b]pyridin-3-yl)-3-hydroxy-2H-1-benzofuran-2-carbonyl]-4-methyl-1,4-benzoxazin-3-one using the IUPAC nomenclature.
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C30H21ClN2O6
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