C=C(C)[C@@H]1Cc2oc(cc2C(=O)OC)[C@@H]2O[C@@]2(C)C[C@H]2OC(=O)[C@@]3(O[C@H]23)[C@@H](OC(C)=O)C1	13α-acetoxy-11β,12β-epoxypukalide