the bactericidal activity of six new rifamycin derivatives -- rifabutin ( rbu ) , fce 22250 ( f22 ) , rifapentine ( rpe ) , cgp 29861 ( c29 ) , cgp 7040 ( c70 ) and cgp 27557 ( c27 ) and rifampicin ( rmp ) -- have been measured against log phase and , as a better test of sterilising activity , against stationary phase cultures of mycobacterium tuberculosis , h37rv .
C0035609
rifamycin
C0140575
rifabutin