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![(2E)-2-methyl-2-Butenoic acid, (9R)-9,10-dihydro-8,8-dimethyl-2,10-dioxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester,CAS No. 156041-02-0. (2E)-2-methyl-2-Butenoic acid, (9R)-9,10-dihydro-8,8-dimethyl-2,10-dioxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester,CAS No. 156041-02-0.](https://public.whmall.com/system/0/chemical/image/2007/09/04/1188888888-3731901_C19H18O6.png) 
  (2E)-2-methyl-2-Butenoic acid, (9R)-9,10-dihydro-8,8-dimethyl-2,10-dioxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester CAS No.156041-02-0 / Cat No.EBD3731901
(2E)-2-methyl-2-Butenoic acid, (9R)-9,10-dihydro-8,8-dimethyl-2,10-dioxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester
(2E)-2-methyl-2-Butenoic acid, (9R)-9,10-dihydro-8,8-dimethyl-2,10-dioxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-yl ester
2-Butenoic acid,2-methyl-,(9R)-9,10-dihydro-8,8-dimethyl-2,10-dioxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-ylester, (2E)- (9CI)
2-Butenoicacid, 2-methyl-, 9,10-dihydro-8,8-dimethyl-2,10-dioxo-2H,8H-benzo[1,2-b:3,4-b']dipyran-9-ylester, [R-(E)]-
2H,8H-Benzo[1,2-b:3,4-b']dipyran, 2-butenoic acid deriv.
Qianhucoumarin E