2,7-(Epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-8-carboxaldehyde, 1,2-dihydro-1,11-dioxo-5,6,9,17,19,21-hexahydroxy-2,4,12,16,18,20,22-heptamethyl-23-methoxy-, 21-acetate, 8-((2-hydroxyethyl)hydrazone) 3-Formylrifamycin SV, N-(2-hydroxyethyl)hydrazone KD1577500 Rifamycin AF/hei