Using O=c1[nH]c(-c2ccc(Cl)cc2Cl)cc2nc(C3CCNCC3)nn12, BrCC1CC1 to produce O=c1[nH]c(-c2ccc(Cl)cc2Cl)cc2nc(C3CCN(CC4CC4)CC3)nn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.