Synonyms: Rifamycin B butyldimethylhydrazide;NSC 145606;BRN 5418669;NCI 145-606;17607-47-5;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)-,1-butyl-2,2-dimethylhydrazide, 21-acetate;Rifamycin, 4-O-(2-(1-butyl-2,2-dimethylhydrazino)-2-oxoethyl)-;Rifamycin, 4-O-[2-(1-butyl-2,2-dimethylhydrazino)-2-oxoethyl]-;LS-11772;Rifamycin B, 1-butyl-2,2-dimethylhydrazide;Rifamycin, 4-O-(2-(1-butyl-2,2-dimethylhydrazino)-2-oxoethyl)- (9CI)