What is "clogestone"

n. A therapeutic progestin.

Clogestone ( INN, BAN), also known as chlormadinol or as 3β,17α-dihydroxy-6-chloropregna-4,6-diene-20-one, is a steroidal progestin that was synthesized in 1964 and was investigated as a progestin-only contraceptive but was never marketed. A di acetate ester, clogestone acetate, also exists and similarly was never marketed.