2-Butenoic acid, 4-hydroxy-2-methyl-, 1a,2,3,6,7,7a,8,9,10a,10b-decahydro-1a-(hydroxymethyl)-5-methyl-8-methylene-9-oxooxireno(9,10)cyclodeca(1,2-b)furan-7-yl ester, (1aS-(1aR*,4E,7S*,(E),7aS*,10aR*,10bS*))- 57718-77-1 Eupahyssopin Eupassopin