Antibiotic obtained from a Streptomyces variant considered as possibly effective against Streptococcus pyogenes infections. It may promote growth in poultry.

Pyridine derivatives with one or more keto groups on the ring.

A genus of bacteria that form a nonfragmented aerial mycelium. Many species have been identified with some being pathogenic. This genus is responsible for producing a majority of the ANTI-BACTERIAL AGENTS of practical value.