Using COc1cc2c(Oc3ccc(Br)cc3F)ncnc2cc1OCCCNS(C)(=O)=O, CI to produce COc1cc2c(Oc3ccc(Br)cc3F)ncnc2cc1OCCCN(C)S(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.