6o7 Unclassified Metabolites 



1277 Sporidesmin (probably) Ci9H:;iO,iN;<SXlCCl4, colorless crystals 



(carbon tetrachloride solvate) sintering from 109°-^ 

 resins 125° semi-solid -^ meniscus at 130-134°, [a]i.-" 

 -19° (c 2.2 in methanol). 



Other formulae without chlorine are not excluded, 

 since the solvent-free compound has not been isolated. 

 The compound is a toxin in animals. 



Sporidesmiiim bakeri Syd. 



R. L. M. Synge and E. P. White, Chem. and Ind., 1546 

 (1959). 



1278 Streptocardin, Crystalline, U.V. 365 (242) (252) m^^ in phos- 



phate buffer (pH 6) forms water-soluble alkali salts. 



Streptomyces sp., Nocardia sp. 



W. P. Fisher, Roy A. Machlowitz, Alfred A. Tytell and Jesse 

 Charney, "Antibiotics Annual 1953-1954," Medical Encyclope- 

 dia, Inc., New York, p. 177. 



1279 Streptolydigin, C;i.H4e09No (or C3,-H.-^oOioNo), m.p. 144-150° 



(dec), [alo"' —93° (c 1.6 in chloroform). 



An enolic acid. Positive FeCls, iodoform. Negative 

 biuret, ninhydrin, Fehling, Molisch. Reacts with Bto in 

 CCI4. 



Streptomyces lydicus 



T. E. Eble, C. M. Large, W. H. DeVries, G. F. Crum and 

 J. W. Shell, "Antibiotics Annual 1955-1956," Medical Encyclo- 

 pedia, Inc., New York, p. 893. 



Streptovaricin (Dalacin). A complex consisting of at least five 

 active closely related components. These were separated 

 by countercurrent distribution into Streptovaricins : 



1280 A, C34H4-.490i;^N, yellow crystals, m.p. 182-184°, [2W +454° 



(CHCI3). 



1281 B, C34H4749O13N, yellow crystals, m.p. 195-200°, [aW* -fl68° 



(CHCI3). 



1282 C, C34H4-.4c,0,3N, yellow crystals, m.p. 168-171°, [ajir" +317° 



(CHCI3). 



1283 D, yellow crystals, m.p. 115-118°, hW^ +102° (CHCI3). 



1284 E, yellow crystals, m.p. 102-105°, [aW +6.13° (CHCI3). 



