599 Unclassified Metabolites 



1226 Nocardianin, C6r,.67H»6.i04Oi5Ni8, red prisms, m.p. 228-235° 



(dec), [a]i."" -223° (c 0.3 in methanol). 



Negative biuret, ninhydrin. 



Nocardia sp. 



I. R. Bick, Gregory J. Jann and Donald J. Cram, Antibiotics 

 and Chemotherapy 2 255 (1952). 



1227 Nocardorubin, crimson powder, darkens from 180° (dec.). 



Nocardia narasinoerisis 



J. Antibiotics (Japan) 8B 253 (1955). 



1228 Nonactin, C;,oH^^O,,, colorless crystals, m.p. 147°, optically in- 



active. 



Slight U.V. at 264 m^ (log e = 1.5 in ethanol). Inert 

 to chemicals and microbes. 



Streptomyces spp. which produce cycloheximide. 



R. Corbaz, L. Ettlinger, E. Gaumann, W. Keller-Schierlein, 

 F. Kradolfer, L. Neipp, V. Prelog and H. Zahner, Helv. Chini. 

 Acta 38 1445 (1955). 



1229 Nordin, CigHieO^sCL, m.p. 134-136°. 



Occurs with estin (q.v.). 



Penicilliuin paxilli var. echinulatum 



Eitaro Komatsu, Japanese Patent 4799 (1953). 



1230 Nudic Acid A, C,4H2i,0;^ (proposed), colorless crystals, m.p. 



123.5°. 



No reducing properties. Takes up bromine. 



Tricholoma nudum 



H. W. Florey, E. Chain, N. G. Heatley, M. A. Jennings, A. G. 

 Sanders, E. P. Abraham and M. E. Florey, "Antibiotics," Oxford 

 University Press, London, 1949, p. 358. 



1231 Nybomycin, C1SH14O4N0, colorless crystals, which darken at 330° 



without melting. 



Negative ninhydrin, biuret, FeClg; sugar tests, Ehrlich, 

 KM,.04, Bro. 



Streptomyces sp. 



Frieda Strelitz, Helen Flon and Igor N. Asheshov, Prac. Nat. 

 Acad. Sci. U. S. 41 620 (1955). 



T. E. Eble, G. A. Boyack, C. M. Large and W. H. De Vries, 

 Antibiotics and Chemotherapy 8 627 (1958). 



1232 Oligomycin A, C24H4yO(., colorless crystals, m.p. 140° (dec), 



150° (dec.) (polymorphic), [alo"^ —54.5° (c 4.40 in diox- 

 ane). 



