O1C(CNC(=O)C(NC(=O)C(NC(=O)OC(C)(C)C)C(C)C)Cc2ccccc2)C(O)C(O)C1CNC(=O)C(NC(=O)C(NC(=O)OC(C)(C)C)C(C)C)Cc3ccccc3