2,7-(Epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-1,11(2H)-dione, 3-formyl-5,6,9,17,19,21-hexahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-, 21-acetate, O-undecyloxime 3-Formylrifamycin SV O-undecyloxime 41776-59-4 BRN 5418754 NSC 165125 Rifamycin, 3-(((undecyloxy)imino)methyl)- (9CI)