2,4-Decadienoic acid, 1,2,3,4,4a,4b,5a,6,6a,7,9a,9b-dodecahydro-3,6,6a,9b-tetrahydroxy-5a-(hydroxymethyl)-1,8-dimethyl-3-(1-methylethenyl)-7-oxobenz(7,8)azuleno(5,6-b)oxiren-4-yl ester, (1R-(1alpha,3alpha,4alpha,4abeta,4bbeta,5abeta,6beta,6a))