17-alpha-Ethynyl-estr-5(10)-ene-3-beta,17-beta-diol 17alpha-Ethynyl-estr-5(10)-ene-3beta,17beta-diol 19-Nor-17-alpha-pregn-5(10)-en-20-yne-3-beta,17-diol 19-Norpregn-5(10)-en-20-yne-3,17-diol, (3-beta,17-alpha)- 2307-97-3 3-beta-Hydroxynorethynodrel