1. Chemistry of Heterocyclic Compounds
2. N. P. BuuHoi and G. Saint-Ruf, Bull. Soc. Chim. France, 1920 (1960) present a number of typical examples.
3. Heterocyclische Verbindungen, II. Über höherkondensierte Chinoxaline
4. All melting points are corrected and taken in capillaries. Analyses are by Gnaps. Mass spectra by Morgan-Schaffer Corp.