3-氧代-4-氮杂-5-雄烷-17B-羧酸

3,20-dioxo-4-aza-5α-pregnane

黄体酮

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

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