17-(acetyloxy)-3-ethoxy-9,11α-dihydro-6'H-benzo[10,9,11]-19-norpregna-3,5-dien-20-one

17-(acetyloxy)-9,11α-dihydro-6'H-benzo[10,9,11]-6α,7α-epoxy-19-norpregn-4-ene-3,20-dione

17-(acetyloxy)-6β-chloro-9,11α-dihydro-7α-[(methylsulfonyl)oxy]-6'H-benzo[10,9,11]-19-norpregn-4-ene-3,20-dione