Using OC1CCCCC1, O=C(O)c1csc(C2CCN(C(=O)Cn3nc(C(F)F)cc3C(F)F)CC2)n1 to produce O=C(OC1CCCCC1)c1csc(C2CCN(C(=O)Cn3nc(C(F)F)cc3C(F)F)CC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.