Using NCCCl, CCc1nn(CCO)c(CC)c1Oc1cc(Cl)cc(Cl)c1 to produce CCc1nn(CCOCCN)c(CC)c1Oc1cc(Cl)cc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.