Using CCOC(=O)COc1ccc(SCC=C(c2ccco2)c2ccco2)cc1C(F)(F)F to produce O=C(O)COc1ccc(SCC=C(c2ccco2)c2ccco2)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.