Praeruptorin A

2-Butenoic acid, 2-methyl-, (9R,10R)-10-(acetyloxy)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester, (2Z)-rel-; 2-Butenoic acid, 2-methyl-, 10-(acetyloxy)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester, [9α(Z),10α]-(±)-; 2H,8H-Benzo[1,2-b:3,4-b']dipyran, 2-butenoic acid deriv.; (±)-Praeruptorin A; 2-Butenoic acid, 2-methyl-, 10-(acetyloxy)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester, [9α(Z),10α]-; dl-Praeruptorin A; Praeruptorin A; 2-Methyl-2-butenoic Acid [9α(Z),10α]-(±)-10-(Acetyloxy)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl Ester; 2H,8H-Benzo[1,2-b:3,4-b']dipyran-2-butenoic Acid deriv.; 2-Methyl-2-Butenoic Acid [9α(Z),10α]-10-(Acetyloxy)-9,10-dihydro-8,8-dimethyl-2-oxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl Ester;