Synonyms: | 18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-[(trimethylsilyl)oxy]-, (17α)-;D-(-)-Norgestrel Trimethylsilyl Ether;(8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-trimethylsilyloxy-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one |