2-Butenoic acid, 2-methyl-, 1,2,3,3a,4,5,8,8a-octahydro-3-hydroxy-6,6a-dimethyl-3-(1-methylethyl)-8-oxo-4-azulenyl ester, (3R-(3alpha,3abeta,4beta(Z),8aalpha))- 79863-24-4 Lapidin