329 Amino Acids and Related Compounds 



antibiotic hydrolysates. Desulfurization with Raney 

 nickel yields L-alanine and D-a-amino-/2-butyric acid. 



Phyllis F. Downey and Simon Black, /. Biol. Chem. 228 171 

 (1957). 



705 L-Phenylalanine, CgHnOoN, colorless crystals, m.p. 283° (dec.) 



(rapid heating), [aW^ —35° (c 2 in water). 



/ \— CH2— CH— COOH 



NH2 



Widely distributed. 



706 L-Tyrosine, C9H11O3N, colorless crystals, m.p. 342-344° (sealed 



capillary, preheated bath) (dec), [a]D" —10.6° (c 4 in 

 1 N hydrochloric acid). 



HO—/ V-CHo— CH— COOH 



NH2 

 Widely distributed. 



707 Hercynine (Histidine Betaine), C9H15O2N3, white crystals, no 



sharp m.p., forms mono- and dipicrates. 



HC— C— CH2— CH— COO ® 

 N NH ©N(CH3)3 



H 



Amanita muscaria, Agaricus campestris, Boletus edulis 

 Bull., Polyporus sulfureus 



Fr. Kutscher, Zentr. Physiol. 24 775 (1910). 



R. Engeland and F. Kutscher, ibid. 26 569 (1912). (Syn- 

 thesis) 



Albert Kiing, Z. phijsiol. Chem. 91 241 (1914). 



708 Ergothioneine, C9H15O2N3S, colorless crystals, m.p. 290° (dec), 



[a]D-M16.5°. 



CH=C— CH2— CH— COO ® 



I I 1 



N NH N(CH3)3 



I 

 SH 



