Using NC1C(=O)Nc2ccccc2SC1c1ccccc1, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)CN1C(=O)C(N)C(c2ccccc2)Sc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.