Synonyms: 2,7-(Epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan-1,11(2H)-dione,8-[(diethylamino)methyl]-5,6,9,17,19,21-hexahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-(8CI); 2,7-(Epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan, rifamycinderiv.