Using COC(=O)[C@H](O)[C@@H](NC(=O)OC(C)(C)C)c1ccc(F)cc1F, C=C(C)OC to produce COC(=O)[C@@H]1OC(C)(C)N(C(=O)OC(C)(C)C)[C@H]1c1ccc(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.