Using CCOC=O, CC(=O)C(C)(C)Cc1ccc(SC(F)(F)F)cc1 to produce CC(C)(Cc1ccc(SC(F)(F)F)cc1)C(=O)C=CO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.