135 



Other Macrolides 



274 



Naibomycin, C^-sH^oOyN, colorless crystals, 

 [ai- +68.5° (c 1.35 in chloroform). 



m.p. 113.5-115°, 



Streptomyces narboensis n. sp. 



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

 F. Kradolfer, E. Kyburz, L. Neipp, V. Prelog, P. Reusser, and 

 H. Zahner. Helv. Chim. Acta 38 935 (1955). 



R. Anliker, D. D. Dvornik, K. Gubler, H. Heusser and V. 

 Prelog, ibid. 39 1785 (1956). 



V. Prelog, A. M. Gold, G. Talbot and A. Zamojskl. (To be 

 published) 



275 Leucomycin, C:i3,;^s;H54.p,jO,,_,;{N, colorless crystals, m.p. 124- 

 125.5°, [air,-" -67.1° (c 1 in ethanol). 



Leucomycin appears to be a macrolide antibiotic* 



Streptomyces kitasatoensis n. sp. 



Toju Hata, Yoshimoto Sano, Natsuo Ohki, Yasuhiku Yoko- 

 yama, Akihiro Matsumae and Shinya Ito, /. Antibiotics (Ja- 

 pan) 6A 87 (1953). 



Yoshimoto Sano, Tadashi Hoshi and Toju Hata, ibid. 7A 

 88 (1954). 



Yoshimoto Sano, ibid. 7A 93 (1954). 



* See addendum. 



