Pfizer Handbook of Microbial Metabolites 320 



665 L-Alanine, C3H7O2N, colorless crystals, m.p. 297° (dec), [cnW^ 



+8.5° (9.3% solution of the hydrochloride in water). 



CH3— CH— COOH 

 NH2 

 Widely distributed. 



666 /^-Alanine, C3H7O2N, colorless crystals, m.p. 207° (dec.) (pre- 



heated bath). 



H2N— CH2— CH2— COOH 

 Widely distributed. 



667 L-Serine, C3H7O3N, colorless crystals, m.p. 228° (dec.) (sub- 



limes 150° at 10-* mm. Hg), [aW +14.45° (0.5 g. per 

 5.6 g. of 1 N hydrochloric acid). 



HO— CH2CH— COOH 



I 

 NH2 



Widely distributed. 



668 L-Aspartic Acid, C4H7O4N, colorless crystals, m.p. 270° (sealed 



capillary, preheated bath) (dec), [a]D-* +24.6° (c 2 in 6 N 

 hydrochloric acid). 



HOOC— CH2— CH— COOH 

 NH2 

 Widely distributed. 



669 L-Asparagine, C4H8O3N2, colorless crystals ( Monohydrate ) , m.p. 



234°, (dec) (preheated bath), [ajn'" -5.5° (c 1.3 in wa- 

 ter). 



O 

 H2N— C— CH2— CH— COOH 

 NH2 

 Widely distributed. 



