COC(=O)C[C@H]1C(C)(C)[C@H](OC(C)=O)[C@]2(OC(C)=O)C[C@@]34OC2(O)[C@]1(C)[C@H]3CC[C@]1(C)C4=CC(=O)O[C@H]1c1ccoc1	tabulvelutin B