Using O=C([O-])[O-], CNC(=O)[C@H](C(=O)OC)N(C)C(=O)OC(C)(C)C to produce CNC(=O)[C@](C)(C(=O)OC)N(C)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.