2-Pentenoic acid, 3-methyl-5-(1,2,3,4,4a,7,8,8a-octahydro-1,2,4a,5-tetramethyl-1-naphthalenyl)-, (1S-(1alpha(E),2beta,4abeta,8aalpha))- 25436-90-2 25906-81-4 Kolavenic acid