Phenanthridine derivatives, process for their preparation and agents for carrying out the method.

DESCRIBED 1.8 - DIHYDROXY - 3 - METHYL BENZO (B) phenanthridine - 7.12 - DION AND ITS DERIVATIVES F''ROMULA (I), wherein R1 is HO THE REST OF FORMULA (II), and salts TALES OF COMPOUND WHERE R1 is the residue of formula (II). They RETAIN these compounds using a new procedure MICROBIOLOGICAL AND CAN BE USED FOR DISEASE TUMOR THERAPY.