Using CCOC(=O)c1c(Cl)cc(C(F)(F)F)nc1C(F)(F)F, CCOC(=O)Cl to produce CCOC(=O)c1c(C(F)(F)F)nc(C(F)(F)F)c(C(=O)OCC)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.