Using OB(O)c1cccnc1, Cn1cc(-c2ccc3ncc(Cc4ccc5ncc(Br)n5c4)n3n2)cn1 to produce Cn1cc(-c2ccc3ncc(Cc4ccc5ncc(-c6cccnc6)n5c4)n3n2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.