abstract |
(57) The present invention provides a compound of the formula (I): (Wherein R 1 and R 2 are each independently a group selected from a hydroxyl group and an alkoxy having 1 to 4 carbon atoms; and R 3 and R 4 are each independently methyl or ethyl, or R 3 and R 4 Forms a pyrrolidino, methylpyrrolidino, dimethylpyrrolidino, piperidino, morpholino, or hexamethyleneimino ring together with the nitrogen atom to which they are attached). To a patient in need of treatment for benign prostatic hyperplasia or prostate cancer. |