CC(=O)OC[C@@]1(C)[C@@H]2C[C@H](OC(C)=O)[C@@]3(C)Oc4cc(-c5cccnc5)oc(=O)c4C[C@@H]3[C@@]2(C)CC[C@@H]1OC(C)=O	13-dehydroxylpyripyropene A