Definitive Nomenclature for Vitamins B-6 and Related Compounds (Tentative Rules)Those who have served on the IUPAC–IUB Commision on Biochemical Nomenclature for varying periods during 1967–1972 are the following. Present Members are shown by an asterisk *. O. Hoffmann-Ostenhof* (Chairman), W. E. Cohn* (Secretary), A. E. Braunstein*, J. S. Fruton, B. L. Horecker*, P. Karlson*, B. Keil*, W. Klyne*, C. Liébecq*, E. C. Slater, N. Tamiya, S. Veibel, E. C. Webb*, W. J. Whelan*. Comments on and suggestions for future revisions of this nomenclature should be sent to: Prof. O. Hoffmann-Ostenhof, Lehrkanzel für Biochemie der Universität Wien, Währinger Strasse 38, A-1090 Wien, Austria.