Pfizer Handbook of Microbial Metabolites 606 



1271 Rubromycin, thin square rods, m.p. 215° (dec.) U.V. 518-520, 



546, 584 m^. 



C 60.30, H 4.26, O 33.91 



Contains no N (differing from rhodomycin). Differs 

 from rhodomycetin in that the latter is found in the cul- 

 ture solution; the present compound is in the mycelium. 



Streptomyces collinus n. sp. 



Hans Brockman and Karl Heinz Renneberg, Naturwissen- 

 schaften 40 59 (1953). 



1272 Ruticin, orange needle-hke crystals, U.V. 227, 262, 364 m^x. 



Streptomyces res. S. rutgersensis 



W. P. Fisher, Jesse Charney, Ray A. Machlowitz, James E. 

 Blair and Alfred A. Tytell, "Antibiotics Annual 1953-1954," 

 Medical Encyclopedia, Inc., New York, p. 174. 



1273 Sarcidin, m.p. 274-275° (dec). 



C 41.89, H 5.02, N 21.82 and a qualitative sulfur test. 

 Tamio Takeuchi, Kazuo Nitta and Hamao Umezawa, /. Anti- 

 biotics (Japan) 6A 31 (1953). 



1274 Secalonic Acid, C31H30.32O14, lemon-yellow needles, m.p. 244- 



250° from chloroform, [a],,-" -81° (acetone), -66° (chlo- 

 roform), -198°->-59° (pyridine). 



Claviceps purpurea 



F. Kraft, Arch. Pharm. 244 336 (1906). 



A. Stoll, J. Renz and A. Brack, Helv. Chim. Acta 35 2022 

 (1952). 



1275 Seligocidin, crystalline powder, U.V. 304 m^j, in ethanol. 



Positive Sakaguchi and ninhydrin; negative biuret. 

 Streptomyces res. S. roseochromogenes 

 Shoshiro Nakamura, Kenji Maeda, Yoshiro Okami and 

 Hamao Umezawa, J. Antibiotics (Japan) 7A 57 (1954). 



1276 Sirenin, CoiHsgO^N. 



Mol. V^t. : found 386, calculated 414. Contains a lac- 

 tone ring, a carbonyl group and a — C=C — or — C=N — 

 bond. The absence of hydroxyl and carboxyl groups and 

 of aromatic rings was ascertained. 



Allomyces species 



Sirenin is a sex hormone of this water-mold. 



Leonard Machlis, Nature 181 1790 (1958). 



