Benzoic acid, p-(2-((1,2-dihydro-5,6,9,17,19,21-hexahydroxy-2,4,12,16,18,20-heptamethyl-23-methoxy-1,11-dioxo-2,7-(epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-8-yl)methylene)hydrazino)-, 21-acetate DG8576070 Rifamycin AF/pib Rifamycin SV, 3-(((4-carboxyphenyl)hydrazono)methyl)-