Synonyms: A-Norpregn-20-yne-2,17-diol,2-ethynyl-, bis(hydrogen butanedioate), (2b,5a,17a)-; AF 113; Butanedioic acid,1,7-diethynylhexadecahydro-8a,10a-dimethyldicyclopenta[a,f]naphthalene-1,7-diylester, [1R-(1a,3ab,3ba,5ab,7a,8aa,8bb,10aa)]-; SIPPR 113