Synonyms: Rifamycin B tripropylhydrazide;NSC 144139;BRN 5418830;38123-25-0;Acetic acid, ((1,2-dihydro-5,6,17,19,21-pentahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-2,7-(epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-9-yl)oxy)-, 21-acetate, 1,2,2-tripropylhydrazide;Rifamycin, 4-O-(2-oxo-2-(tripropylhydrazino)ethyl)-;Rifamycin, 4-O-[2-oxo-2-(tripropylhydrazino)ethyl]-;NSC144139;NSC-144139;LS-11770;Rifamycin, 4-O-(2-oxo-2-(tripropylhydrazino)ethyl)- (9CI);Acetic acid,2-dihydro-5,6,17,19,21-pentahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-2,7-(epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan-9-yl]oxy]-, 21-acetate, 1,2,2-tripropylhydrazide