Dopan is effective in the treatment of twelve various experimental tumors. It is most effective in the treatment of fusiform sarcoma-45, Torashchansky's polymorphocellular sarcoma and carcinoma of the uterus in mice. The effect is moderate in case of Brown-Pearce tumors, polymorpho-cellular sarcoma M-1, Ehrlich's adenocarcinoma, Crocker's sarcoma and carcinorma of the mammary glands in mice. Little effect was observed in treating induced sarcoma in rats, leukosis of mice and cancer of the liver.