Using CC(=O)Nc1nc(C)c(-c2cc(S(=O)(=O)N3CCC(O)CC3)sc2Br)s1 to produce CC(=O)Nc1nc(C)c(-c2csc(S(=O)(=O)N3CCC(O)CC3)c2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.