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-(4-methylpiperidinomethyl)-, 21-acetate 4075-47-2 NCI 144-148 Rifamycin SV, 8-(4-methylpiperidinomethyl)-