(3R,3aS,4R,6R,7R,9S,9bR)-6,7,9-trihydroxy-3,6,9-trimethyl-2-oxo-2,3,3a,4,5,6,7,8,9,9b-decahydroazuleno[4,5-b]furan-4-yl rel-(2Z)-2-methylbut-2-enoate 2-Methyl-but-2-enoic acid 6,7,9-trihydroxy-3,6,9-trimethyl-2-oxo-2,3,3a,4,5,6,7,8,9,9b-decahydro-azuleno[4,5-b]furan-4-yl ester 2-butenoic acid, 2-methyl-, (3aR,4S,6S,7S,9R,9bS)-2,3,3a,4,5,6,7,8,9,9b-decahydro-6,7,9-trihydroxy-3,6,9-trimethyl-2-oxoazuleno[4,5-b]furan-4-yl ester, (2Z)- 8alpha-Angeloxy-2alpha,4alpha,10beta-trihydroxy-6betaH,7alphaH,11betaH-1(5)-guaien-12,6alpha-olide InChI=1/C20H28O7/c1-6-9(2)17(22)26-12-8-20(5,25)14-11(21)7-19(4,24)15(14)16-13(12)10(3)18(23)27-16/h6,10-13,16,21,24-25H,7-8H2,1-5H3/b9-6-/t10-,11-,12-,13+,16-,19+,20-/m0/s