Ethinodiol

(17R)-19-Norpregn-4-en-20-yne-3β,17-diol

17-alpha-ethynyloestr-4-ene-3-beta,17-beta-diol

19-nor-17-alpha-pregn-4-en-20-yne-3-beta,17-diol

(3S,8R,9S,10R,13S,14S,17R)-17-ethynyl-13-methyl-2,3,6,7,8,9,10,11,12,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol