Using NCCCN1CCOCC1, O=C(Cl)c1ccc(-c2ccc(Br)cc2)o1 to produce O=C(NCCCN1CCOCC1)c1ccc(-c2ccc(Br)cc2)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.