143526-66-3 3'-Hydroxy-5'-(4-isopropyl-1-piperazinyl)benzoxazinorifamycin AIDS-008517 AIDS008517 KRM 2312 KRM-2312 KRM2312 Rifamycin VIII, 1,4-didehydro-1-deoxy-1,4-dihydro-3'-hydroxy-5'-[4-(1-methylethyl)-1-piperazinyl]-1-oxo-