Breast and Prostate Cancer Treatment Method

A method to treat a condition selected from the group consisting of prostate cancer, benign prostatic hyperplasia and breast cancer in a subject in need thereof, comprising administering an effective amount of a compound having the structure

• wherein,
• R5 is —OH, an ester, a carbonate or an ether and R6 is —H or alkynyl, or R6 is —OH, an ester, a carbonate or an ether and R5 is —H or alkynyl;
• R12 is —OH, —SH, an ester, a carbonate or an ether and R13 is —H or R12 is —H and R13 is —OH, —SH, an ester, a carbonate or an ether;
• R14 and R15 independently are —H, —OH, an ester or a carbonate;
• R16 and R17 independently are —H, —OH, an ester or a carbonate;
• R18 is —OH, an ester, a carbonate or an ether;
• R19 is alkynyl;
• R24 is —CH3 or —CH2OH;
• and
• R25 is —H, —CH3 or —CH2OH.