10-Hydroperoxy-7-methylnorethindrone 17-heptanoate 19-Norpregn-4-en-20-yn-3-one, 10-hydroperoxy-7-methoxy-17-((1-oxoheptyl)oxy)-, (7alpha,17alpha)- 7alpha-Methylnorethindrone enanthate 10-beta-hydroperoxide 93176-68-2 HPMN