Pfizer Handbook of Microbial Metabolites 150 



Edmund C. Kornfeld, Reuben G. Jones and Thomas V. 

 Parke, ibid. 71 150 (1949). (Structure) 



Tomoharu Okuda, Chem. Pharm. Bull. (Japan) 7 659 

 (1959). (Stereochemistry) 



309 Cycloheximide Diasterioisomer, Ci-,H^,304N, colorless rectangu- 



lar plates, m.p. 100-105°, [a]u'' +12°. 



The crystal form differed from that of cycloheximide, 

 and a mixture with authentic cycloheximide melted at 

 85-95°. 



Streptomyces albidus 



Cycloheximide, 4-acetoxycycloheximide, two antibioti- 

 cally inert compounds B-73 and C-73 and fungicidin were 

 isolated from the same culture. 



K. Rao. Abstracts. 134th Meeting of the American Chemical 

 Society, Chicago, September 1958. 



310 Naramycin B, Ci-,H^:^04N, colorless plates, m.p. 109°, [ajn^'^ 



+50.2° (c 2.0 in methanol). 



Streptomyces sp. 



A stereoisomer of cycloheximide. 



Tomoharu Okuda, Makato Suzuki, Yoshiyuki Egawa and 

 Kokichi Ashino, Chem. Pharm. Bull. (Japan) 6 328 (1958). 

 (Isolation) 



Tomoharu Okuda, ibid. 7 659 (1959). (Stereochemistry) 



311 Streptovitacin A, Ci5H2sOr,N, colorless crystals, m.p. 156-159°. 



OH 



O 



CH3 Y CH— CH2 /^ 



o 



Streptomyces griseus 



T. E. Eble, M. E. Bergy, C. M. Large, R. R. Herr and W. G. 

 Jackson, "Antibiotics Annual 1958-1959," Medical Encyclope- 

 dia, Inc., New York, p. 555. (Isolation) 



