CC1(C)[C@@H](OC(=O)CCC(=O)O)CC[C@]2(C)C3C(=O)C=C4[C@@H]5C[C@@](C)(C(=O)O)CC[C@]5(C)CC[C@@]4(C)[C@]3(C)CC[C@@H]12    mol30165