6β-methyl-16α,17α-cyclobutanopregnan-5α-ol-3,20-dione
16α,17α-cyclobutano-5α,6α-epoxypregnane-3β,20β-diol 3-acetate
16α,17α-cyclobutanopregn-5-ene-3β,20β-diol 3-acetate
6β-methyl-16α,17α-cyclobutanopregnan-3β,5α,20β-triol
3β-Acetoxy-16α,17α-aethylen-20-oxo-pregnen-5