Intramolecular condensation of steroidal 17α-formyl 17β-acetates: model studies on 19-norsteroids, and a route to 3-methoxy-19- nor-17α-pregna-1,3,5(10).Triene 21,17-carbolactone
Intramolecular condensation of steroidal 17α-formyl 17β-acetates: model studies on 19-norsteroids, and a route to 3-methoxy-19- nor-17α-pregna-1,3,5(10).Triene 21,17-carbolactone
Intramolecular condensation of steroidal 17α-formyl 17β-acetates: model studies on 19-norsteroids, and a route to 3-methoxy-19- nor-17α-pregna-1,3,5(10).Triene 21,17-carbolactone