Pfizer Handbook of Microbial Metabolites 30 



32 D-Mannonic Acid, CfjHioO^, forms y- or 8-lactones, but the free 

 acid cannot be isolated pure. 



COOH 



J 



HCOH 



I 

 HCOH 



HOCH 



HOCH 



CH,OH 



P. purpurogeninn var. rubrisclerotium (on D-mannose) 

 Acetobacters 



Galactonic acid, etc., can be produced similarly from 

 the corresponding sugar. 



A. Angeletti and C. F. Cerruti, Ann. chim. applicata 20 424 

 (1930). 



33 D-Glucosamine (Chitosamine) CeHigOr.N, white needles, m.p. 

 110° (dec), [a],;-"' +47.5° (c 1 in water). 



CHO 



I 

 HC— NH2 



I 

 HOCH 



HCOH 



HCOH 



CH.OH 



Many bacteria, fungi and lichens. Present in bound 

 form in mold mycelium. Produced by the action of cer- 

 tain streptomyces species on chitin. 



Joseph J. Noval and Walter J. Nickerson, Bacteriol. Proc, 

 125 (1956). 



LesUe Ralph Berger and Donald M. Reynolds, Biochim. et 

 Biophys. Acta 29 522 (1958). 



