Using CCOC(=O)c1cnn(-c2nc3c(Cl)cccc3n2COCCOC)c1 to produce CCOC(=O)c1cnn(-c2nc3c(Cl)cccc3[nH]2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.