Using BrC(Br)(Br)Br, Cc1ccsc1C(=O)Nc1cc(CO)ccc1/C=C/c1n[nH]c2ccccc12 to produce Cc1ccsc1C(=O)Nc1cc(CBr)ccc1/C=C/c1n[nH]c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.