17-Hydroxy-3-oxo-17?-pregn-4-ene-21-carboxylic Acid ?-Lactone; 17?-Hydroxy-3-oxopregn-4-en-21-carboxylic Acid ?-Lactone; 3-(3-Oxo-17?-hydroxy-4-androsten-17-yl)propionic Acid ?-Lactone; 3-(3-Oxo-17?-hydroxyandrost-4-en-17?-yl)propiolactone; 3'-(3-Oxo-17?-hydroxyandrost-4-en-17?-yl)-propionic Acid Lactone; SC 5233; Spironolactone EP Impurity C;6,7-Dihydrocanrenone
17-Hydroxy-3-oxo-17?-pregn-4-ene-21-carboxylic Acid ?-Lactone; 17?-Hydroxy-3-oxopregn-4-en-21-carboxylic Acid ?-Lactone; 3-(3-Oxo-17?-hydroxy-4-androsten-17-yl)propionic Acid ?-Lactone; 3-(3-Oxo-17?-hydroxyandrost-4-en-17?-yl)propiolactone; 3'-(3-Oxo-17?-hydroxyandrost-4-en-17?-yl)-propionic Acid Lactone; SC 5233; Spironolactone EP Impurity C;6,7-Dihydrocanrenone