Using NCCc1ccc(O)c(O)c1, Nc1nc(N)c2nc(CBr)cnc2n1 to produce Nc1nc(N)c2nc(CNCCc3ccc(O)c(O)c3)cnc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.