6,7-dihydro-6,8,8,10-tetramethyl-8H-pyrano(3,2-g)chromone-2-carboxylic acid;3,4-Dihydro-2,2,4,10-tetramethyl-6-oxo-2H,6H-benzo[1,2-b:5,4-b']dipyran-8-carboxylic acid
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