1-Phenanthrenecarboxylic acid, 7-ethenyl-1,2,3,4,4a,4b,5,6,7,8,10,10a-dodecahydro-1,4a,7-trimethyl-, methyl ester, (1R-(1alpha,4abeta,4balpha,7alpha,10aalpha))- 1686-62-0 METHYL ISOPIMARATE Methyl (1R-(1alpha,4abeta,4balpha,7alpha,10aalpha))-7-ethenyl-1,2,3,4,4a,4b,5,6,7,8,10,10a-dodecahydro-1,4a,7-trimethyl-1-phenanthrenecarboxylate