Using COc1cc(NCCCNCc2ccc(Cl)c(Cl)c2)nc2cccc(Cl)c12 to produce O=c1cc(NCCCNCc2ccc(Cl)c(Cl)c2)[nH]c2cccc(Cl)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.