Synonyms: Cyclobuta[1,2:3,4]dicyclopentene,1,2,3,3a,3b,4,6a,6b-octahydro-3a,6-dimethyl-1-(1-methylethyl)-, (1a,3aa,3bb,6ab,6ba)-; Cyclobuta[1,2:3,4]dicyclopentene, 1,2,3,3a,3bb,4,6ab,6ba-octahydro-1a-isopropyl-3aa,6-dimethyl- (7CI,8CI); (?à)-a-Bourbonene; a-Bourbonene