Synonyms: (-)-Viguiestenin;[1aR,3S,4Z,5aR,8aR,9R,10aR,(-)]-3-Acetoxy-1aβ,2,3,5aα,7,8,8aβ,9,10,10a-decahydro-4,10aα-dimethyl-8-methylene-7-oxooxireno[5,6]cyclodeca[1,2-b]furan-9-ol 2-methylpropionate;2-Methylpropanoic acid [1aR,3S,4Z,5aR,8aR,9R,10aR,(-)]-3-acetyloxy-1aβ,2,3,5aα,7,8,8aβ,9,10,10a-decahydro-4,10aα-dimethyl-8-methylene-7-oxooxireno[5,6]cyclodeca[1,2-b]furan-9-yl ester;Viguiestenin