63 Aliphatic Acids and Glycolipides 



90 a-Methylbutyric Acid, C-.HjoOo, colorless crystals, m.p. 176°, 



[a],r^ +17.6°. 



CHaCH-CHCOOH 



CH3 



Peuicillium notatum 



Donald J. Cram and Max Tishler, /. Am. Chem. Soc. 70 

 4238 (1948). 



91 a,/i-DihydroxyisovaIeric Acid, C,-,H,o04, colorless syrup, [ccW^ 



-12.4° (c 2 in dilute HCl, pH 1 ) and + 10° (c 2 in water, 

 pH 5.5-6.5). Forms crystalline quinine salt. 



CH3 



\ 



C — CH— COOH 



CH3 OH OH 



A valine precursor isolated from a Neurospora crassa 

 mutant 



John R. Sjolander, Karl Folkers, Edward A. Adelberg and 

 E. L. Tatum, ;. Am. Chem. Soc. 76 1085 (1954). 



92 cis-Aconitic Acid, C,jH,;0,;, colorless crystals, m.p. 125°. 



HC— COOH 



II 



C— COOH 



I 

 CH2— COOH 



Aspergillus niger 



This acid presumably is present to some extent in all 

 organisms with the citric acid cycle. 



Kinichiro Sakaguchi and Shinichiro Baba, Bull. Agr. Chem. 

 Soc. (Japan) 18 95 (1942). (Not isolated) 



93 a«o-Isocitric Acid (Lactone), C,.H„Oe, m.p. 140-141° [aW"" 



+ 42.3° (c 4.83 in water). 



O 



/C. 



COOH CHo 



I " ^ 



J 1/ 



c — c 



H COOH 



