Using COC(=O)c1ccc(F)cc1OCCCCCNC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)NCCCCCOc1cc(F)ccc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.