Synonyms: Pregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, ?-lactone, (17a)-, 17a-Pregn-4-ene-21-carboxylic acid, 17-hydroxy-3-oxo-, ?-lactone (6CI,7CI,8CI), 17ß-Hydroxy-3-oxopregn-4-en-21-carboxylic acid ?-lactone, 3-(3-Oxo-17ß-hydroxy-4-androsten-17-yl)propionic acid ?-lactone, 3-(3-Oxo-17ß-hydroxyandrost-4-en-17a-yl)propiolactone, 3′-(3-Oxo-17ß-hydroxyandrost-4-en-17a-yl)-propionic acid lactone, 6,7-Dihydrocanrenone, SC 5233, (2’R)-3′,4′-Dihydro-5’H-spiro[androst-4-ene-17,2′-furan]-3,5′-dione, Aldone