Using NNc1ccc(F)cc1F, CCOC=C(C(=O)OCC)C(=O)OCC to produce CCOC(=O)c1c[nH]n(-c2ccc(F)cc2F)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.