Using CC(C)(C)c1cc(-n2nc3c(Br)ccc(Br)c3n2)c(O)c(C(C)(C)C)c1 to produce CC(C)(C)c1cc(-n2nc3c(-c4ccccc4)ccc(-c4ccccc4)c3n2)c(O)c(C(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.