Using BrCc1cccc(Br)c1, COCCOc1nc(N)c2[nH]cnc2n1 to produce COCCOc1nc(N)c2ncn(Cc3cccc(Br)c3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.