Synonyms: Rifamycin B dipropylethylhydrazide;NSC 144138;BRN 5418785;38123-24-9;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, 2,2-dipropyl-1-ethylhydrazide;NSC144138;NSC-144138;LS-11766;Rifamycin, 4-O-(2-(1-ethyl-2,2-dipropylhydrazino)-2-oxoethyl)-;Rifamycin, 4-O-(2-(1-ethyl-2,2-dipropylhydrazino)-2-oxoethyl)- (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, 2,2-dipropyl-1-ethylhydrazide