C=C1CC[C@@H](C(C)C)[C@@H](O)[C@H]2[C@H]1CC[C@]2(C)O (1S,3aR,7S,8R,8aR)-1-methyl-4-methylidene-7-propan-2-yl-2,3,3a,5,6,7,8,8a-octahydroazulene-1,8-diol