17-Hydroxy-3-oxo-17.alpha.-pregna-4,6-diene-21-carboxylic acid .gamma.-lactone 17.Alpha.-(2-Carboxyethyl)-17.beta.-hydroxyandrosta-4, 6-dien-3-one lactone 17.Alpha.-Pregna-4,6-diene-21-carboxylic acid, 17-hydroxy-3-oxo-, .gamma.-lactone 976-71-6 AIDS-128317 AIDS128317 Aldadiene Canrenone NSC261713 Phanurane Pregna-4, 6-diene-21-carboxylic acid, 17-hydroxy-3-oxo-, .gamma.-lactone, (17.alpha.)- Pregna-4,6-diene-21-carboxylic acid, 17-hydroxy-3-oxo-, .gamma.-lactone (17.alpha.)- RP 11641 SC 9376 SC-9376 Spirolactone SC 14266