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-[O-(2-piperidinoethyl)oxime], 21-acetate 22912-87-4 NCI 143-479 NSC143479 Rifamycin, 3-[[[2-(1-piperidinyl)ethoxy]imino]methyl]-