C/C1=C\CC[C@@](C)(O)[C@@H](O)/C=C(/C(C)C)CC[C@]2(C)O[C@H]2CC1 (1S,4E,6S,7R,10E,14S)-1,7,11-trimethyl-4-propan-2-yl-15-oxabicyclo[12.1.0]pentadeca-4,10-diene-6,7-diol