C=C1[C@@H](OC(C)=O)[C@@H]2[C@](C)(C(=O)C(O)=C3C(C)(C)C(=O)C=C[C@]32C)[C@]2(C(=O)OC)C(=O)[C@@H](C)OC(=O)[C@]12C	aspermeroterpene B