Synonyms: Rifamycin B butylpiperidinylamide;NSC 145607;BRN 5418878;Acetamide, 2-((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)-N-butyl-N-piperidinyl-, 21-acetate;Rifamycin, 4-O-(2-(butyl-1-piperidinylamino)-2-oxoethyl)-;38123-34-1;LS-9221;Rifamycin, 4-O-(2-(butyl-1-piperidinylamino)-2-oxoethyl)- (9CI)