Synonyms: Azulene,1,2,3,4,5,6,7,8-octahydro-1,4-dimethyl-7-(1-methylethenyl)-, [1S-(1a,4a,7a)]-; Azulene, 1,2,3,4,5,6,7,8-octahydro-7b-isopropenyl-1b,4b-dimethyl- (7CI); Guaia-1(5),11-diene (8CI);1,2,3,4,5,6,7,8-Octahydro-1,4-dimethyl-7-(1-methylethenyl)-[1S-(1a,4a,7a)] azulene; a-Guaiene