1. a J. B. Hester, Jr. and A. R. Hanze, (to Upjohn), U. S. Patent 3,917,627 (1975);
2. c Centre d'Etudes pour l'Industrie Pharmaceutique, German Patent 2,321,705 (1973);
3. d J. P. Maffrand, G. Ferrand and F. Eloy, Trtrahedron Letters, 3449 (1973).
4. 6-Phenyl-4H-s-triazolo[4,3-a][1,4]benzodiazepines which have central nervous system depressant activity