3,5-seco-4-norpregn-5,20-dion-3-carboxylic acid

3,5-seco-4-norpregn-5,20-dioxo-3-(ethoxycarbonyl)carboxylate

4-aza-pregn-5-ene-3,20-dione

3-((3S,3aS,5aS,6R,9aS,9bS)-3-acetyl-3a,6-dimethyl-7-oxododecahydro-1H-cyclopenta[a]naphthalen-6-yl)propanamide

3,20-dioxo-4-aza-5α-pregnane