Using c1cc(-c2cn[nH]c2)n2nc(Nc3ccc(OCCN4CCCC4)cc3)nc2c1, COC(=O)CBr to produce COC(=O)Cn1cc(-c2cccc3nc(Nc4ccc(OCCN5CCCC5)cc4)nn23)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.