The preparation of 3-alpha- and 3-beta,17-beta-Dihydroxy-17-alpha-ethynyl-estr-5(10)-ene.
D004962:Estranes / Q000138:chemical synthesis*; D009641:Norethynodrel; D010084:Oxidation-Reduction
D004962:Estranes; D009641:Norethynodrel