69873-18-3

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 2H,6H-Benzo[1,2-b:5,4-b']dipyran-8-carboxylic acid, 3,4-dihydro-2,2,4,10-tetramethyl-6-oxo- (9CI)