Using NNc1c2ccc(Cl)cc2nc2c(=O)[nH][nH]c(=O)c12, CCOC(=O)CCN to produce CCOC(=O)CCNc1c2ccc(Cl)cc2nc2c(=O)[nH][nH]c(=O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.