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-piperidinoformimidoyl)-, 21-acetate 3-Formylrifamycin SV, piperidinohydrazone KD1920870 Rifamycin AF/api Rifamycin SV, 3-((1-piperidinylimino)methyl)-