Using COC(=O)c1sc(C(=O)NCc2cccc3[nH]ccc23)cc1C(F)(F)F to produce O=C(NCc1cccc2[nH]ccc12)c1cc(C(F)(F)F)c(C(=O)O)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.