Using CCOS(=O)(=O)OCC, COC(=O)C1=C(C)NC(=O)CC1c1ccc(C(F)(F)F)cc1 to produce CCN1C(=O)CC(c2ccc(C(F)(F)F)cc2)C(C(=O)OC)=C1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.