Using NNc1ccc(Cl)cc1Cl, CCOC=C(C(=O)OCC)C(=O)C(F)(F)F to produce CCOC(=O)c1cnn(-c2ccc(Cl)cc2Cl)c1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.