Synonyms: 3-Formylrifamycin SV hydrazone;NCI 145-616;17774-87-7;Rifamycin, 3-(hydrazonomethyl)-;LS-64156;15009-49-1;2,7-(Epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-8-carboxaldehyde, 1,2-dihydro-5,6,9,17,19,21-hexahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-, 8-hydrazone, 21-acetate