THE VITAMIN B COMPLEX 



Pyridinium bromide hydrobromide, i- 

 ( 4'-amino-2'-methylpyTimidyl-5'- 

 methyl)-3-j3-hydroxyethyl-, 123. 



, 3 - i3 - hydroxyethyl - 2 - 



methyl-, 123. 

 2 - Pyridone - 3 - carboxylamide, N^-me- 

 thyl-, 256. 



3 - carboxylamide, N^-me- 

 223, 226, 253, 255, 257, 260. 



6 - Pyridone 



thyl-, 221 

 6 - Pyridone - 3 - carboxylic acid, N^-me- 



thyl-, 256. 

 Pyridoxal, biological properties of, 343, 



344- 

 — , chemical constitution of, 300. 

 — , estimation of, 312, 313. 

 — , preparation of, 301. 

 — , stability of, 308. 

 Pyridoxal phosphate, 331, 344, 628. 



— 3-phosphate, 332. 

 acetal, 332. 



— 5-phosphate, 332, 

 Pyridoxamine, biological properties of, 



343. 344- 

 — , chemical constitution of, 300. 

 — , estimation of, 312, 313. 

 — , preparation of, 301. 

 — , stability of, 308. 

 Pyridoxic acid, 326, 344, 346, 485. 

 P5rridoxine 



analogues of, 342-347. 



animal and human requirements of, 

 328, 329. 



antagonists of, 345-346. 



chemical constitution of, 298-301. 



discovery of, 296-298, 404. 



effect of deficiency in animals, 317-322. 



man, 322-325. 



estimation of, 309-315. 



function of, 262, 330-338. 



human and animal requirements of, 

 328-329. 



in higher plants, 341. 



in nutrition of micro-organisms, no, 



338-341- 



intestinal synthesis of, 327-328. 



isolation of, 298. 



metabolism of, 325-327. 



occurrence in foodstuffs, 315-317. 



pharmacological action of, 329-330. 



properties of, 307-308. 



requirements of insects, 341-342. 



stability of, 308-309. 



synthesis of, 301-307. 

 Pyridoxine, 4 : 5-epoxy-, 342. 

 — , 4-ethyl-, 342. 

 — , 3-methyl-, 342. 

 — , 4-methyl-, 342, 345. 

 Pyridoxine betaine, N-methyl-, 343. 



— boric acid complex, 343. 



— 4 : 5-diacetate, 342, 343. 



P5a-idoxine triacetate, 342. 

 Pyridoxyl-benzylamine, 344. 



histamine, 344. 



isobutylamine, 344. 



— -/S-phenylethylamine, 344. 



tryptamine, 344. 



tyramine, 344. 



Pyrimidine, 4-amino-5-aminomethyl-2- 

 ethyl-, 118. 



2-methyl-, 17, 18, 19, 20, 118, 



T19. 



— -5-bromomethyl-2-methyl-, 15, 

 17, 20, 21, 119. 



5-carbethoxy-2-methyl-, 118. 



5-chloromethyl-2-methyl-, 119. 



5-cyano-2-methyl-, 17. 



2 : 5-dimethyl-, 12, 118. 



5-ethoxymethyl-2 -methyl-, 2 1,33. 



2-amino-4-ethyl-, 119. 

 4-amino-6-ethyl-, 119. 



• 5-thioformamido-, 17. 



6-hydroxy-2 -methyl-, 118. 



5-hydroxymethyl - 2 - methyl - , 



118, 119. 



2 - methyl - 5 - thioformamido - 



methyl-, 17, 18, 19, 118, 119. 

 2 - (6' - bromonaphthyl -^' - amino) - 

 4 - diethylaminoethylamino - 6 - 

 methyl-, 209. 

 4-chloro-5-cyano-2-methyl-, 17. 



1 - p - chloroanilino - 4 - diethyl- 

 aminoethylamino-6-methyl-, 209. 



2-/?-chlorophenylguanidino - 4 - di - 

 ethylaminoethylamino-6-methyl-, 

 209. 



5-cyano-4-hydroxy-2-methyl-, 17. 



2 : 4-diamino-5-dichloroacetylamino 

 -6-hydroxy-, 476. 



5-methyl-, 513. 



5 - ethoxymethyl - 4 - hydroxy - 2 - 



methyl-, 13, 15, 16. 

 4-hydroxy-2 : 5-dimethyl-, 118. 



— - 2 : 6 - bis - (hydroxymethyl) - 5 - 

 methyl, 346. 



2-hydroxy-5-methyl-4-thio-, 513. 

 2:4:5: 6-tetraamino-, 521, 522. 

 2:4: 5-triamino-6-hydroxy-, 472, 



474. 475. 476. 

 Pyrimidine-5-acetic acid, 4-chloro-2- 

 methyl-, 20. 



— ■ — , 4-hydroxy-2-methyl-, 16, 20. 

 4-carboxylic acid, 288. 



— -5-carboxylic acid, 2-amino-, 561. 

 Pyrimidines as growth factors for micro- 

 organisms, 622. 



— , inhibition of thiaminase by, 25. 



Pyrimidinium bromide hydrobromide, 

 3 - (4' - amino - 2' - methyl - 5' - pyri - 

 midylmethyl) - 6 - hydroxy - 5 - j3 - hy - 

 droxyethyl-4-methyl-, 124. 



682 



