2-Butenoic acid, 2-methyl- 6-(acetyloxy)-2,3,3a,4,5,6,6a,7,8,9b-decahydro-3,3a-dihydroxy-3,6,9-trimethyl-4-((3-methyl-1-oxo-2-butenyl)oxy)-2-oxoazuleno(4,5-b)furan-7,8-diyl ester, (3R-(3alpha,3abeta,4alpha,6beta,7beta(Z),8alpha(Z),9balpha))- 81127-16-4 Thapsivillosin A