Using COC(=O)c1ccc(-c2c[nH]nc2C(F)(F)F)cc1Cl, CCCS to produce CCCSc1cc(-c2c[nH]nc2C(F)(F)F)ccc1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.