Using Cl, COc1cc(N)ccc1-c1nc2c[nH][nH]c(=O)c-2n1 to produce COc1cc(Cl)ccc1-c1nc2c[nH][nH]c(=O)c-2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.