Rifamycin
The rifamycins are a group of antibiotics that are synthesized either naturally by the bacterium Amycolatopsis mediterranei or artificially. They are a subclass of the larger family Ansamycin. Rifamycins are particularly effective against mycobacteria, and are therefore used to treat tuberculosis, leprosy, and mycobacterium avium complex (MAC) infections.
The rifamycin group includes the "classic" rifamycin drugs as well as the rifamycin derivatives rifampicin (or rifampin), rifabutin, rifapentine and rifalazil.
Read more about Rifamycin: Bacterium, First Drugs, Clinical Trials, Mechanism of Action, Biosynthesis, Derivatives, Currently Available Rifamycins