CC(C)=CCc1cc2[nH]c3c(c2cc1CC=C(C)C)C[C@@H]1CC[C@@]2(O)C4=CC(=O)[C@@H](C(C)(C)O)O[C@H]4CC[C@]2(C)[C@@]31C 21,22-Diprenylpaxilline