Using Nc1c[nH]nc1C(=O)Nc1ccc(F)cc1, O=C(O)c1ccccc1F to produce O=C(Nc1c[nH]nc1C(=O)Nc1ccc(F)cc1)c1ccccc1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.