metabolites of the antimycobacterial agent 4-deoxo-3,4- [ 2-spiro- ( n-isobutyl-4-piperidyl ) ] - ( 1h ) -imidazo- ( 2,5-dihydro ) - rifamycin s ( rifabutin ) were isolated from human urine after administration of a single oral dose of the drug .
C0360390
antimycobacterial agent
C0140575
rifabutin