rac-3,3-ethanediyldioxy-11,20-dioxo-16,17-seco-14β-pregn-5-en-16-oic acid methyl ester
p-toluenesulfonyl chloride
rac-3,3-ethanediyldioxy-14β,17ξH-pregn-5-ene-11,16,20-trione
rac-3,3-ethanediyldioxy-11,20-dioxo-16,17-seco-13α-pregn-5-en-16-oic acid methyl ester
rac-3,3-ethanediyldioxy-13α,17ξH-pregn-5-ene-11,16,20-trione