2,7-(Epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-1,11(2H)-dione, 3-formyl-5,6,917,19,21-hexahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-, 21-acetate, O-butyloxime 3-Formylrifamycin SV O-butyloxime 38128-83-5 AF 010 BRN 5418293 NSC 143474 Rifamycin, 3-((butoxyimino)methyl)- (9CI)