2649-76-5 3-Ethoxy-pregna-4,6-diene-21-carboxylic acid, hydroxy-gamma-lactone 3-Ethoxypregna-3,5-diene-21,17alpha-carbolactone Aldona ethyl enol ether BRN 1297803 EINECS 220-165-4 Pregna-3,5-diene-21-carboxylic acid, 3-ethoxy-17-hydroxy-, gamma-lactone, (17-alpha)- SC-11982