25-O-deacetyl-27-O-demethyl-1,4-dideoxy-1,4-dihydro-1,4-dioxo-Rifamycin; 2,7-(Epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan, rifamycin deriv ,25-O-deacetyl-27-O-demethyl-1,4-dideoxy-1,4-dihydro-1,4-dioxo-Rifamycin; 2,7-(Epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan, rifamycin deriv ,rifamycin