Using O=C(NCC(=O)N1CCN(C(=O)OCCC(F)(F)F)CC1)OCc1ccccc1 to produce NCC(=O)N1CCN(C(=O)OCCC(F)(F)F)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.