Using CC(C)c1ccncn1, O=C(Cn1cncn1)c1ccc(F)cc1F to produce CC(C)(c1ccncn1)C(O)(Cn1cncn1)c1ccc(F)cc1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.