Using OCC(F)(F)F, CCOC(=O)c1c(C)cc(C(F)(F)F)nc1Cl to produce CCOC(=O)c1c(C)cc(C(F)(F)F)nc1OCC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.