17α-pregna-4,9(11)-diene-7α,21-dicarboxylic acid-17β-hydroxy-3-oxo-γ-lactone-7-methyl ester
methyl hydrogen 17α-hydroxy-11α-(methylsulfonyl)oxy-3-oxopregn-4-ene-7α,21-dicarboxylate, γ-lactone
11β,17β-dihydroxy-7α-methoxycarbonyl-pregna-4-en-3-one-21-carboxylic acid, γ-lactone
eplerenone