545 



Purines 



1041 Angustmvcin A, CjiH,304N.r,, colorless needles, m.p. (anhydr.) 



169.5° (dec.), [<xW^ +48.3°. 

 Probable structure: 





— C 



II 

 C— OH 



I 

 H— C— OH 



I 

 H— C— OH 



1 



- C— H 



I 

 CH3 



Adenine 



>L-2-Ketofucopyranose 



Streptomyces hygroscopicus 



Hsii Yiintsen and Hiroshi Yonehara, Bull. Agr. Chem. Soc. 

 (Japan) 21 261 (1957). 



Hsii Yiintsen, Kazuhiko Ohkuma, Yoshio Ishil and Hiroshi 

 Yonehara, J. Antibiotics (Japan) 9A 195 (1956). (Isolation 

 and characterization) 



Hsii Yiintsen, ibid. IIA 79 (1958). (Structure) 



1042 Angustmycin C (Psicofuranine), C11H15O5N5, colorless crystals, 

 m.p. 202-204°, [aW^ -71.1° (c 1.8 in pyridine). 



NH2 



N \f 



HOCHo 



CH2OH 



OH OH 



Streptomyces hygroscopicus var. angustmyceticus 

 Hsu Yiintsen, /. Antibiotics (Japan) llA 244 (1958). 

 (Structure) 



