I. NOMENCLATURE 



221 



Obsolete names: Adermin^ 



Antiacrodynia rat factor 

 Aiitidermatitis rat factor 

 Yeast eliiate factor^ 

 Factor P 

 Factor Y^ 

 ^'itamin H^ 



Complementary factor^ 

 Empirical formulas: Pyridoxine: CsTIuOsX 

 Pyridoxal: CsHgOsX 

 Pyridoxamine: CsHioOoNo 

 Chemical names: Pyrodoxine: 3-hydrox3'-4,5-dihydroxymethyl-2-methyl- 

 pyridine 

 Pyridoxal : 3-hydroxy-4-formyl-5-hydroxymethyl-2-meth- 



ylpyridine 

 Pj'ridoxamine: 3-hydroxy-4-aminomethyl-5-hydroxy- 

 methyl-2-methylpyridine 

 Structural formulas: 



CH.OH 



CHO 



CH2NH2 



HO 



H3C— 



— CHoOH 



HO 



H3C 



CH2OII 



HO- 



H3C- 



-CH2OH 



-H 



N 

 Pyridoxamine 



' R. Kuhn and G. Wendt, Ber. 61, 1534 (1938). 



' C. E. Edgar and T. F. Macrae, Biochcm. J. 31, 886 (1937); M. M. El-Sadr, T. F. 



Macrae, and C. E. Work, Biochem. J. 33, 611 (1939). 

 s S. Lepkovsky, T. H. Jukes, and M. E. Krause, J. Biol. Chem. 115, 557 (1936). 

 « H. Chick, A. M. Copping, and M. H. Roscoe, Biochem. J. 24, 1748 (1930). 

 ' L. R. Richardson and A. G. Hogan, Missouri Agr. Expl. Sta. Research Bull. 241 



(1936): L. E. Booher, J. Biol. Chem. 119, 223 (1937). 

 * P. Gyorgy, R. Kuhn, and T. Wagner-Jauregg, .\'atnnvis!<. 21, 561 (1933). 



