| abstract |
Rifamycin derivatives of the formula are described in which Ri represents an optionally substituted biphenylyl radical, and in which XX, YY and ZZ each represent vinylene of the formula CH = CH, or in which XX and YY each represent ethylene of the formula CH 2 -CH 2 and ZZ represent ethylene or vinylene, and processes for their manufacture. These compounds can be used as antibacterial and antiviral drugs. |