Using OB(O)c1cccc(-c2ccccc2)c1, CCn1c(-c2nc(Br)cnc2N)nc2cnccc21 to produce CCn1c(-c2nc(-c3cccc(-c4ccccc4)c3)cnc2N)nc2cnccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.