Gestaclone (INN, USAN) (developmental code name SH-1040), also known as 6-chloro-1α,2α:16α,17-bismethylene-4,6-pregnadiene-3,20-dione, is a steroidalprogestin of unique chemical structure derived from progesterone that was first described in 1967 and was never marketed.[1]
↑The organic chemistry of drug synthesis. 2. Wiley. 1980. p. 168. ISBN978-0-471-04392-8.
↑Neumann F, Wiechert R, "1,2-alpha,16,17-alpha-bismethylene-delta-4,6-pregnadienes", US patent 3441647, issued 1969-04-29, assigned to Schering AGand Bayer Pharma AG
↑Gries H, Heinz J, "Process for the production of α,β-methylene ketones of the steriod series", DE patent 1286033, published 1969-01-02, assigned to Schering AGand Bayer Pharma AG