182 THE ANTIBIOTICS 



a 3 . Streptomycin group 

 Streptomycin 

 Mannosidostreptomycin 

 Reticulin-Hydroxy streptomycin 

 Dextromycin? 

 b 2 . Not inactivated by cysteine. 



a 3 . Active against bacteria of the B. cereus-B. mycoides 

 group, not active against fungi. 

 a 4 . Neomycin group 

 Neomycin 

 Catenulin 

 Flavomycin 

 Framycetin 

 Dextromycin? 

 b 3 . Limited activity against bacteria of the B. cereus- 

 B. mycoides group, active against fungi. 

 a 4 . Streptothricin group. 

 Streptothricin 

 Pleocidin 

 Lavendulin 

 Antibiotic 136 

 Streptolin 

 Streptin 

 Actinorubin 

 Antibiotic El 8 

 Roseomycin 

 Remark — Many streptothricin-like substances have been described, often 

 incompletely. We believe that the exact identification of a substance of this 

 group requires a particularly extensive side-by-side comparison of the anti- 

 microbial spectra and the biological properties of the various members of 

 this group. 



C. Substances active against fungi. 



I. Active against both fungi and bacteria. 



1. Active against gram-positive and gram-negative bacteria. 



a. Neutral. 



a 1 . Yellow-orange; containing sulfur. 



Thiolutin 

 b 1 . Reddish violet. 



Microcin A 



b. Acid. 



