19-Nor-17-alpha-pregn-4-en-20-yne-3-beta,17-diol, 17-acetate 19-Norpregn-4-en-20-yne-3,17-diol, 17-acetate, (3-beta,17-alpha)- (9CI) 2061-46-3 Norethynodiol 17-monoacetate SC 12222