Using Oc1ccc(F)cc1, COC(=O)C(O)Cc1ccc(OCCNC(=O)OC(C)(C)C)cc1 to produce COC(=O)C(Cc1ccc(OCCNC(=O)OC(C)(C)C)cc1)Oc1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.