Zanoterone

Zanoterone (INN, USAN) (former developmental codename WIN-49596), also known as (5α,17α)-1'-(methylsulfonyl)-1'-H-pregn-20-yno[3,2-c]pyrazol-17-ol, is a steroidal antiandrogen that was never marketed. It was investigated for the treatment of benign prostatic hyperplasia (BPH) but failed to demonstrate sufficient efficacy in phase II clinical trials, and also showed an unacceptable incidence rate and severity of side effects (e.g., breast pain and gynecomastia). As such, it was not further developed.

Zanoterone

Zanoterone (INN, USAN) (former developmental codename WIN-49596), also known as (5α,17α)-1'-(methylsulfonyl)-1'-H-pregn-20-yno[3,2-c]pyrazol-17-ol, is a steroidal antiandrogen that was never marketed. It was investigated for the treatment of benign prostatic hyperplasia (BPH) but failed to demonstrate sufficient efficacy in phase II clinical trials, and also showed an unacceptable incidence rate and severity of side effects (e.g., breast pain and gynecomastia). As such, it was not further developed.