Using CCOC=C(C(C)=O)C(=O)OCC, NNc1ccc(OC(F)(F)F)cc1 to produce Cc1c(C(=O)O)cnn1-c1ccc(OC(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.