C=C(C)[C@@H]1CC[C@@H](C)[C@@]2(O)[C@@H]1C=C(C)[C@@H](OC(C)=O)[C@@H]2O [(1S,2R,4aR,5R,8R,8aR)-1,8a-dihydroxy-3,8-dimethyl-5-prop-1-en-2-yl-2,4a,5,6,7,8-hexahydro-1H-naphthalen-2-yl] acetate