17-β-Desogestrel

Chemical Name: (8S,9S,10R,13S,14S,17S)-13-ethyl-17-ethynyl-11-methylene-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-ol

Synonym: 2-methylpropan-2-amine (2-amino-2-methylpropane, tert-butylamine, 1,1-dimethylethylamine),