17-((Trimethylsilyl)oxy)-19-norpregn-4-en-20-yn-3-one 3-oxime 19-Norpregn-4-en-20-yn-3-one, 17-((trimethylsilyl)oxy)-, oxime, (17-alpha)- 82332-10-3 SO 35 Siloxy-norethisterone oxime So-35