CC(=O)O[C@H]1/C=C(C)/C=C\C=C(/C)C(=O)C[C@@H]2[C@]1(C)CC[C@@]2(O)C(C)C (1S,2S,3E,5Z,7E,11R,12R)-2-acetoxy-12-hydroxydolabella-3,5,7-trien-9-one