Novel antiandrogenic agent

摘要

A compound of general formula (I): wherein, for example, X<1> and X<2> independently represent a hydrogen atom, R represents a hydrogen atom or a protecting group for a hydroxyl group, R and R form an optionally protected -(C=O)- together with the 3-position carbon atom attached to R and R, and the broken line forms a single bond or a double bond together with the solid line, or a pharmaceutically acceptable salt of the compound or a prodrug thereof.