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C23H30O4 is orthorhombic, P212121. The unit-cell dimensions at 293 K are a = 6.0490(3), b = 12.7788(7), c = 26.8859(15)A, V = 2078.25(19)A3, Dx = 1.184 g/cm3, and Z = 4. The R value is R = 0.050 for 3663 reflections. The A, B, C and D rings occur in distorted half chair, distorted chair, distorted chair, and distorted envelope conformations. The molecules in the crystal are packed at the normal van der Waals distances.

Crystal Structure and Synthesis of 3.BETA.-Acetoxy-4,16-pregnadiene-6,20-dione