O1C(=O)OC2(C)C1C(C)C(=O)C(C)CC(O)(C)C(OC3OC(C)CC(N(C)C)C3O)C(C)C(OC4OC(C)C(O)C(C)(OC)C4)C(C)C(=O)OC2CC.O=C(O)CCC(N)C(=O)O