FIELD: chemistry.
SUBSTANCE: invention relates to a crystalline modification of 3β-hydroxy-5-androsten-17-one FVII and a method for production thereof. The disclosed crystalline modification of 3β-hydroxy-5-androsten-17-one FVII is characterised by a set of interplanar distances (Ǻ) and corresponding intensities: 13.027 - 2.6; 10.819 - 15.5; 8.914 - 2.2; 5.942 - 63.7; 5.406 - 100; 5.280 - 0.2; 5.188 - 2.2; 4.933 - 28.9; 4.727 - 7.4; 4.448 - 2.5; 4.383 - 5.7; 4.320 - 0.4; 4.226 - 2.7; 4.194 - 2.5; 3.916 - 3.1; 3.845 - 0.8; 3.709 - 1.4; 3.578 - 1.2; 3.500 - 0.9; 3.443 - 1.8; 3.335 - 0.9; 3.244 - 2.4; 3.229 - 3.1; 3.088 - 1.4; 2.962 - 4.2; 2.894 - 2.5; 2.847 - 0.7; 2.807 - 0.6; 2.685 - 0.7; 2.649 - 1.0; 2.610 - 1.1; 2.581 - 0.3; 2.507 - 0.3; 2.455 - 0.4; 2.372 - 0.5; 2.348 - 0.7, and crystal lattice parameters: type - monoclinic, spatial group P21, a=13.10(9) Ǻ, b=5.93(5) Ǻ, c=10.85(9) Ǻ, α=90°, β=97.7(2)°, γ=90°, V=831(5) Ǻ3, ρcal.=1.11 g/cm3, Z=2 C18H28O2, infrared spectra in the ranges 3300-3600 cm-1; 2700-3000 cm-1; 1700-1750 cm-1; 1000-1100 cm-1.
EFFECT: improved method.
2 cl, 2 tbl, 16 dwg, 9 ex
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