Using CCB(CC)CC, O=c1c(-c2ccc(Cl)nc2)cc(-c2ccccn2)cn1-c1ccccc1 to produce CCc1ccc(-c2cc(-c3ccccn3)cn(-c3ccccc3)c2=O)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.