Using O=S(=O)(OCC(F)(F)F)C(F)(F)F, CCOC(=O)c1cc(=O)[nH]n1-c1ncccc1Cl to produce CCOC(=O)c1cc(OCC(F)(F)F)nn1-c1ncccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.