2-Butenoic acid, 2-methyl-, decahydro-1,6-dihydroxy-3a,6-dimethyl-1-(1-methylethyl)-5-oxo-4,8-azulenediyl ester, [1R-[1.alpha.,3a.alpha.,4.beta.(Z),6.beta.,8.beta.(Z),8a.beta.]]- 7067-12-1 Crotonic acid, 2-methyl-, 4,8-diester with 2,3,3a,4,6,7,8,8a.beta.-octahydro-1.alpha.,4.beta.,6.beta.,8.beta.-tetrahydroxy-1.beta.-isopropyl-3a.alpha.,6-dimethyl-5(1H)-azulenone, (Z,Z)- Crotonic acid, 2-methyl-, 4,8-diester with octahydro-1,4,6,8-tetrahydroxy-1-isopropyl-3a,6-dimethyl-5(1H)-azulenone, (Z,Z)-(1R,3aS,4S,6R,8S,8aS)- Laserpitin NSC109434