Pfizer Handbook of Microbial Metabolites 



44 



65 Mannosidostreptomycin (Streptomycin B), C27H49O17N7, color- 

 less crystals, m.p. (Anhydrous Reineckate) 178° dec. 

 (Trihydrochlorlde) 190-200° dec, [a]u~^ (Trlhydrochlo- 

 ride) -47° (c 1.35 in water). 



CH2OH 



NH NH 



II II 



H2N— C— NH NH— C— NH2 



O^ 



Occurs together with streptomycin in some cultures. 

 Streptomyces griseus 



Josef Fried and Homer E. Stavely, /. Am. Chem. Soc. 74 

 5461 (1952). (Structure) 



66 Phthiocerol, C36H74O3, colorless plates, m.p. 71.5-73°, [(x]j> 

 -4.50° (c 11.48 in chloroform). 



