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