CCC(C)C1OC(=O)C(C)(C)C(O)C(Cc2ccccc2)OC(=O)C(C(C)C)OC(=O)C(NC(=O)c2cccc(Nc3ccc(Nc4cccc(C(=O)N[C@@H]5C(=O)OC(C(C)C)C(=O)OC(Cc6ccccc6)[C@H](O)C(C)(C)C(=O)O[C@@H]([C@@H](C)CC)C(=O)OC5C)c4O)cc3)c2O)C(C)OC1=O zhaoshumycin A