6,9-Dihydro-2-(hydroxymethyl)-5-hydroxy-8-methyl-4H-pyrano[3,2-h][1]benzoxepin-4-one;6,9-Dihydro-5-hydroxy-2-(hydroxymethyl)-8-methyl-4H-pyrano[3,2-h][1]benzoxepin-4-one
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