The molecule is a 17beta-hydroxy steroid that is testosterone in which the hydrogen at position 17 is replaced by an ethynyl group and in which the methyl group attached to position 10 is replaced by hydrogen. It has a role as a synthetic oral contraceptive and a progestin. It is a 17beta-hydroxy steroid, a terminal acetylenic compound, a tertiary alcohol and a 3-oxo-Delta(4) steroid. It derives from a hydride of an estrane.
(8R,9S,10R,13S,14S,17R)-17-ethynyl-17-hydroxy-13-methyl-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one