682 



ARTHUR ISAAC KENDALL 



Paraoxyphenyl acetic acid 

 OH 



2. 



CH 2 CH 2 COOH +30= CH 2 COOH + H 2 O + CO 2 



OH 



Paracresol 

 OH 



3. 



CH 9 COOH 



OH 



CH, 



00 



Paraoxybenzoic acid 

 OH 



30 = 



COOH 



Phenol 

 OH 



C0 2 



b. Tryptophan Decomposition. Similarly, tryptophan undergoes de- 

 composition through a variety of intermediary products, some of which, as 

 indol acetic acid, claimed by Herter to be the urinary pigment urorosein, 

 skatol, and indol, are of some physiological and possibly pathological sig- 

 nificance. Bacillus coli and Bacillus proteus are the common producers of 

 indol in the intestinal tract. [It may be repeated here that utilizable 

 carbohydrate will prevent the formation of indol and skatol.] 



1. 



/VCH 2 CHNH 2 COOH 



Indol propionic acid 

 A CH 2 CH 2 COOH + 



N 



