Using CC(C)(C)OC(=O)CC[C@H](N)C(=O)OC(C)(C)C, O=C(Cl)c1cc(F)c(F)c(F)c1F to produce CC(C)(C)OC(=O)CC[C@H](NC(=O)c1cc(F)c(F)c(F)c1F)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.