Therapeutic effect of estrazin was evaluated on transplantable R3327-H Dunn
ing rat prostatic adenocarcinoma. Delayed and prolonged antitumor action of
estrazin has been demonstrated with maximum inhibition of tumor growth bei
ng attained two month after cessation of such a treatment. Inhibition of tu
mor growth at a dose of 100 mg/kg has amounted to 82%. Therapeutic effect o
f esrtazin exceeded that of both estracyt and flutamide.