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-(2-isopropoxyethyl)oxime 3-Formylrifamycin SV O-(2-isopropoxyethyl)oxime 41970-62-1 BRN 5418515