Using COc1ccc(C2(C)C(=O)Nc3c(Br)cc(Br)cc3C2=O)cc1N to produce CC1(c2ccc(O)c(N)c2)C(=O)Nc2c(Br)cc(Br)cc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.