3β-Acetoxy-17α-hydroxy-16α-methylallopregnan-20-one, C 24 H 38 O 4· 0.5 H 2 O, is an intermediate towards the synthesis of dexamethasone, an important corticosteroid. The compound crystallizes in the monoclinic space group C 2 with unit cell parameters: a= 10.665 (2) Å, b= 7.497 (1) Å, c= 28.200 (4) Å, β= 92.74 (2)°, Z= 4. The crystal structure has been solved by direct methods and refined to R= 0.0419 for 1579 observed reflections. All ...
