13292-43-8 2,7-(Epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-1,11(2H)-dione, 5,6,9,17,19,21-hexahydroxy-2,4,12,16,18,20,22-heptamethyl-23-methoxy-8-(N-morpholinoformimidoyl)-, 21-acetate 3-((4-Morpholinylimino)methyl)rifamycin BRN 0603768 NCI 143-447 NSC 143447 Rifamycin, 3-((4-morpholinylimino)methyl)- (9CI)