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

19,11α-dihydro-5-hydroxy-6'H-benzo[10,9,11]-5α-estrane-3,17-dione cyclic 3-(2,2-dimethyl-1,3-propanediyl acetal)

19,11α-dihydro-5,17β-dihydroxy-6'H-benzo[10,9,11]-5α-estran-3-one cyclic 2,2-dimethyl-1,3-propanediyl acetal

5-hydroxy-4',5',6',11α-tetrahydro-9H-benzo[10,9,11]-5α-estrane-3,17-dione cyclic 3-(2,2-dimethyl-1,3-propanediyl acetal)

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