Using Clc1c(C2=NCCN2)sc2cc(Br)ccc12, OB(O)c1cccc2ccccc12 to produce Clc1c(C2=NCCN2)sc2cc(-c3cccc4ccccc34)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.