2-Ethynyl-20,21,21-trifluoro-A-nor-17alpha-pregn-20-ene-2beta,17-diol 2-alpha-Ethynyl-20,21,21-trifluoro-A-nor-17-alpha-pregn-20-ene-2-beta,17-beta-diol 52-47-1 A-Nor-17-alpha-pregn-20-ene-2-beta,17-beta-diol, 2-alpha-ethynyl-20,21,21-trifluoro- A-Norpregn-20-ene-2,17-diol, 2-ethynyl-20,21,21-trifluoro-, (2beta,17alpha)- BRN 3009493 Dicyclopenta(a,f)naphthalene-1,7-diol, 7-ethynylhexadecahydro-8a,10a-dimethyl-1-(1,2,2-trifluoroethenyl)-, (1S,3aS,3bR,7R,8aS,8bS,10aS)-