Using COC(=O)c1ccc(C(=O)Nc2ccc(C[C@@H](CO)NC[C@H](O)c3cccc(Cl)c3)cc2)cc1 to produce O=C([O-])c1ccc(C(=O)Nc2ccc(C[C@@H](CO)NC[C@H](O)c3cccc(Cl)c3)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.