(-)-Ajugachin B 131086-65-2 Ajugachin B Butanedioic acid, 2,3-dimethyl-, (1R,2S,3R,4aR,5S,6R,8S,8aR)-8-(acetyloxy)-8a-((acetyloxy)methyl)octahydro-3-hydroxy-5,6-dimethyl-5-((2S,3aS,6aS)-2,3,3a,6a-tetrahydrofuro(2,3-b)furan-2-yl)spiro(naphthalene-1(2H),2'-oxiran)-2-yl methyl ester Butanedioic acid, 2,3-dimethyl-, 8-(acetyloxy)-8a-((acetyloxy)methyl)octahydro-3-hydroxy-5,6-dimethyl-5-(2,3,3a,6a-tetrahydrofuro(2,3-b)furan-2-yl)spiro(naphthalene-1(2H),2'-oxiran)-2-yl methyl ester, (1R-(1alpha,2beta,3alpha,4abeta,5beta(2S*,3aS*,6aS*),6alpha,8alpha,8aalpha))-(partial)-