Cyproterone

Cyproterone (INN) is a steroidal antiandrogen that was never marketed.

An acylated derivative, cyproterone acetate, is widely used clinically as an antiandrogen and progestin.

While cyproterone is sometimes used as a synonym for cyproterone acetate, what is almost always being referred to is actually cyproterone acetate and not cyproterone.