6o5 Unclassified Metabolites 



'.' Streptomyces sp. 



Nabuo Tanaka, Hisaji Yamazaki, Koichi Okabe and Hamao 

 Umezawa, /. Ajitibiotics (Japan) lOA 189 (1957). 



1265 Roseomycin, crystalline helianthate, m.p. 211-216° (dec.) and 



reineckate m.p. 114° (dec). 



Positive Molisch, Tollens, indole, glucosamine and 

 Fehling. 



Negative maltol, biuret, ninhydrin and Sakaguchi. 



Streptomyces roseochromogenes 



Nakao Ishida, J. Antibiotics (Japan) 3 845 (1950). 



1266 Rhizobacidin, crystalline, m.p. 215-220° (dec). Contains C, 



H, O and N but not S. Positive biuret, xanthoproteic, 

 ninhydrin and Sakaguchi. Negative Ehrlich, Molisch and 

 FeCla. 



Bacillus subtilis 



Carlos Casas-CampiUo, Ciencia (Mexico) 11 21 (1951). 



1267 Rhodocidin, red powder, U.V. shows a broad peak at 500-530 



mix. Soluble in water and organic solvents. 



Streptomyces phoenix 



Jesse Charney, Roy A. Machlowitz, W. S. Roberts and W. P. 

 Fisher, Antibiotics and Chemotherapy 3 788 (1953). 



Ristocetins (Spontins, Ristins). 



Two closely related amphoteric antibiotics containing 

 amino and phenolic groups and sugars. Each contains 

 four reducing sugars: glucose, mannose, rhamnose and 

 D-arabinose. 



Negative biuret, Sakaguchi, maltol. Positive phospho- 

 molybdic acid test for phenols, ninhydrin (after acid hy- 

 drolysis), anthrone. Mol. Wt. 2500-5000. Contain C, H, 

 O, N, S. 



1268 Ristocetin A (Sulfate): [alo'^ -120-133° (in water). 



1269 Ristocetin B (Sulfate): [ajn" -144-149° (in water). 



Nocardia lurida 



Julian E. Philip, Jay R. Schenck and Martha P. Hargle, 

 "Antibiotics Annual 1956—1957," Medical Encyclopedia, Inc., 

 New York, p. 699. 



1270 Rotaventin, white crystals, m.p. 170-175° (dec). 



Streptom.yces reticuli 



Nobukiko Komatsu and Momoe Soeda, Japan. J. Exp. Med. 

 21 279 (1951). 



