Using O=Cc1cccc(F)c1F, CCOC(=O)c1cc(N)cn1S(C)(=O)=O to produce CCOC(=O)c1cc(N=Cc2cccc(F)c2F)cn1S(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.