Using CC(=O)c1sccc1CBr, CC(C)C1=NC(NC(=O)OC(C)(C)C)C(=O)Nc2ccccc21 to produce CC(=O)c1sccc1CN1C(=O)C(NC(=O)OC(C)(C)C)N=C(C(C)C)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.