2,7-(Epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan, rifamycin deriv. (9CI) 38776-75-9 Rifampicin sodium Rifampicin sodium salt Rifamycin, 3-(((4-methyl-1-piperazinyl)imino)methyl)-, monosodium salt Sodium rifampin