Wawrzak Z, Grochulski P, Gałdecki Z, Duax W L, Strong P D, Kirk D N
Technical University of Lodz, Institute of Physics, Poland.
Acta Crystallogr C. 1991 Feb 15;47 ( Pt 2):385-8. doi: 10.1107/s0108270190005935.
C27H40O4, Mr = 428.6, orthorhombic, P2(1)2(1)2(1), a = 9.821(3), b = 25.766(6), c = 9.802(3) A, V = 2480(2) A3, Z = 4, Dx = 1.15 g cm-3, lambda(Mo K alpha) = 0.71073 A, mu = 0.70 cm-1, F(000) = 936, T = 295 K, final R = 0.063 for 2778 observed reflections. The A ring assumes a normal 1 alpha,2 beta-half-chair conformation. The progesterone side chain has a conformation typical of 17 alpha-ester steroids; the C(16)-C(17)-C(20)-O(20) torsion angle is -17.9(5) degrees.
C27H40O4，Mr = 428.6，正交晶系，P2(1)2(1)2(1)，a = 9.821(3)，b = 25.766(6)，c = 9.802(3) Å，V = 2480(2) ų，Z = 4，Dx = 1.15 g cm⁻³，λ(Mo Kα) = 0.71073 Å，μ = 0.70 cm⁻¹，F(000) = 936，T = 295 K，对2778个观测反射的最终R = 0.063。A环呈正常的1α,2β-半椅式构象。孕酮侧链具有17α-酯甾体典型的构象；C(16)-C(17)-C(20)-O(20)扭转角为-17.9(5)度。
