| abstract |
The invention concerns the new use of riminophenazines in the treatment of a patient who has built up, or could build up, resistance to a therapeutically active substance, such as a patient requiring treatment for cancer. The riminophenazine conveniently may be of the general formula (I). <CHEM> R<1> is a hydrogen atom, a halogen atom or an alkyl, alkoxy or fluoroalkyl radical, R<2> is a hydrogen or halogen atom, R<3> is selected from hydrogen, alkyl, substituted alkyl, cycloalkyl, cycloalkylalkyl, or is a substituted or unsubstituted heterocyclic or heterocyclic-alkyl radical, R<4> is a hydrogen or halogen atom or an alkyl, alkoxy or fluoroalkyl radical, and n is 1, 2 or 3. The invention also provides novel riminophenazines of general formula (I), their preparation, and compositions containing them. |