Using O=C(O)C(F)(F)F, COC1(OC)CCN(C(=O)OC(C)(C)C)CC1OCC(F)F to produce O=C1CCN(C(=O)C(F)(F)F)CC1OCC(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.