Using Nc1cc(Cl)c(F)c(Cl)c1, C[C@@H](NC(=O)OC(C)(C)C)C(=O)O to produce C[C@@H](NC(=O)OC(C)(C)C)C(=O)Nc1cc(Cl)c(F)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.