Using O=S([O-])OO, CCSCCOc1cc2ncnc(Nc3ccc(Br)cc3F)c2cc1OC to produce CCS(=O)CCOc1cc2ncnc(Nc3ccc(Br)cc3F)c2cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.