Using CCOC(=O)C1=C(c2cc(F)c(F)cc2F)CCN(C(=O)OC(C)(C)C)C1 to produce CC(C)(C)OC(=O)N1CC[C@H](c2cc(F)c(F)cc2F)[C@@H](C(=O)O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.