16α,17α-epoxy-3β,5-dihydroxy-5α-pregnane-6,20-dione

3β,5-dihydroxy-16α-methoxy-5α-pregnane-6,20-dione

5-hydroxy-5α-pregn-2-ene-6,20-dione

5,16α,17α-trihydroxy-3β-tosyloxy-5α-pregna-6,20-dione

16α-(tert-butyldimethylsilyloxy)-5,17α-dihydroxy-2α,3α-isopropylidenedioxy-5α-pregna-6,20-dione