Using O=C([O-])[O-], Nc1nonc1-c1nc2ccccc2n1CC(=O)c1ccc(Cl)cc1 to produce CNc1nonc1-c1nc2ccccc2n1CC(=O)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.