Pfizer Handbook of Microbial Metabolites 576 



Streptomyces sp. WC 3628 



McCormick, Canadian Patent 513,324 (1955). 



1085 Antibiotic T, trichothecin-like, crystalline prisms, m.p. 126°, 



[ale'" +135° (c 1 in chloroform). 



A basidiomycete. 



E. T. Glaz, Eszter Scheiber, J. Gyimesi, I. Horwath, Katalin 

 Steczek, A. Szentirmai and G. Bohus, Nature 184 908 (1959). 



1086 Antibiotic X-206, C4fjHgoOi3, colorless crystals, m.p. 126-128°, 



[a]D-" +15.0° (c 2.0 in methanol). 



Streptomyces sp. 



Julius Berger, A. I. Rachlin, W. E. Scott, L. H. Sternbach 

 and M. W. Goldberg, J. Am. Chem. Soc. 72 5295 (1951). 



1087 Antibiotic X-464, C25H40O7, white crystals, m.p. 172-174° 



(dec), [aW +65.9° (c 2.0 in methanol). 



Streptomyces sp. 



Julius Berger, A. I. Rachlin, W. E. Scott, L. H. Sternbach 

 and M. W. Goldberg, J. Am. Chem. Soc. 73 5295 (1951). 



1088 Antibiotic X-537A, C34H-,o08, colorless crystals, m.p. 100-109°, 



[alD'** -7.2° (c 1.0 in alcohol), U.V. 317, 249 m^ in iso- 

 propyl alcohol. 



Positive FeClg test. 



Streptomyces sp. 



Julius Berger, A. I. Rachlin, W. E. Scott, L. H. Sternbach 

 and M. W. Goldberg, /. Am. Chem. Soc. 73 5295 (1951). 



1089 Antibiotic X-1008, CaoHgsOyNgS, cube-like crystals, m.p. 209- 



216° (dec), [o^W -282° (c 1 in chloroform). 



Resembles echinomycin 



Streptomyces sp. 



J. Berger, E. R. LaSala, W. E. Scott, B. R. Meltsner, L. H. 

 Sternbach, S. Kaiser, S. Teitel, E. Mack and M. W. Goldberg, 

 Experientia 13 434 (1957). 



1090 Antibiotic from B. cepae, colorless crystals, m.p. 185° (dec.) 



C 40.8, H 5.3. 



Bacillus cepae 



Isolated from rotting onion. 



M. Fiuczek, Med. Doswiadczalna i Mikrobiol. 2 175 (1950). 

 (Biol. Abstr. 26 3975). 



1091 Antibiotic from B. pumilis, CgHgNoOaS, white crystals, m.p. 



252°. 



Negative ninhydrin. 



