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norvinisterone

n. A therapeutic progestin.

Wikipedia
Norvinisterone

Norvinisterone ( INN) (marketed as Neoprogestin and Nor-Progestelea by Syntex; former developmental code name SC-4641), also known as 17-vinyl-19-nortestosterone (or vinylnortestosterone), is a steroidal progestin with androgenic properties that is or has been used in Europe. It was synthesized in 1953, and was studied in humans by 1960.