Using NCC1(C(F)(F)F)OC(=O)Nc2ccc(Cl)cc21, O=C=Nc1ccc(F)cc1 to produce O=C(NCC1(C(F)(F)F)OC(=O)Nc2ccc(Cl)cc21)Nc1ccc(F)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.