Using CC(=O)c1ccc(NS(C)(=O)=O)c(Nc2ccc(F)cc2F)c1, CON to produce CON=C(C)c1ccc(NS(C)(=O)=O)c(Nc2ccc(F)cc2F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.