Using CCOC(=O)C[C@@H](Cc1cc(F)c(F)cc1F)NC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N[C@@H](CC(=O)O)Cc1cc(F)c(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.