16α,17-epoxy-3-methoxy-19-nor-pregna-1,3,5(10)-trien-20-one

20,20-(ethylenedioxy)-3-methoxy-17α-hydroxy-19-norpregna-1,3,5(10)-triene

20,20-ethanediyldioxy-3-methoxy-19-nor-pregna-2,5(10)-dien-17-ol

19-Hydroxy-17α-acetoxy-3,20-dioxo-Δ4-pregnen

17α-Acetoxy-6β,19-epoxy-3,20-dioxo-Δ4-pregnen