What is "clometerone"

Clometerone ( INN) (developmental code name L-38000), or clometherone ( USAN), also known as 6α-chloro-16α-methylprogesterone, is a synthetic steroid and derivative of progesterone described as an antiandrogen and antiestrogen that was never marketed. Based on structure-activity relationships, clometerone is likely a progestin and antigonadotropin similarly to the related drugs chlormadinone acetate and cyproterone acetate.