Synonyms: 17,19-Dinor-8bH-labda-3,13-dien-15-oic acid,5,9-dimethyl-, (E)-(-)- (8CI); 2-Pentenoic acid,3-methyl-5-(1,2,3,4,4a,7,8,8a-octahydro-1,2,4a,5-tetramethyl-1-naphthalenyl)-,[1S-[1a(E),2b,4ab,8aa]]-; (-)-Kolavenic acid;Kolavenic acid; Kolavenic acid, (-)-; ent-3,E-13-Clerodadien-15-oic acid