Using CC(Br)Br, COc1ccc(CN2C(=O)Cc3c(C#N)cccc32)cc1 to produce COc1ccc(CN2C(=O)C3(CC3)c3c(C#N)cccc32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.