ABSTRACT
STEROIDS: 10β,20S-dihydroxy-3-oxopregna-1,4-diene-18-carboxylic acid lactone, 16α,20S-dihydroxy-3-oxopregn-4-ene-18-carboxylic acid lactone, 20S-hydroxy-3,6dioxopregnane-18-carboxylic acid-18,20-lactone, 20S-hydroxy-3,6-dioxopregn-4-ene-18carboxylic acid-18,20-lactone, 20S-hydroxy-3-oxo-4,6-pregnadiene-18-carboxylic acid18,20-lactone, 20S-hydroxy-3-oxo-4-pregnene-18-carboxylic acid-18,20-lactone.
