5,17β-dihydroxy-17α-(1-propynyl)-4',5',6'11α-tetrahydro-9H-benzo[10,9,11]-5α-estran-3-one cyclic 2,2-dimethyl-1,3-propanediyl acetal

5',6'-dihydro-5,17β-dihydroxy-17α-(1-propynyl)-9H-benzo[10,9,11]-5α-estran-3-one cyclic 2,2-dimethyl-1,3-propanediyl acetal

19-(2-bromoethenyl)-5,17β-dihydroxy-5α-androst-9(11)-ene-3-one cyclic 2,2-dimethyl-1,3-propanediyl acetal

17α-ethynyl-9,11α-dihydro-5,17β-dihydroxy-6'H-benzo[10,9,11]-5α-estrane-3,17-dione cyclic 2,2-dimethyl-1,3-propanediyl acetal

17-(acetyloxy)-9,11α-dihydro-6'H-benzo[10,9,11]-19-norpregna-4,6-diene-3,20-dione