NOVEL STABLE CRYSTALS OF 1-(2-β-D-ARABINOFURANOSYL)CYTOSINE MONOHYDRATE Russian patent published in 2015 - IPC C07H19/06 A61K31/7068 A61P35/00 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to novel crystals of type I of 1-(2'-cyano-2'-desoxy-β-D-arabinofuranosyl)cytosine monohydrochloride, which have characteristic peaks at 13.7°, 15.7°, 16.0°, 18.6°, 20.3° and 22.7° in form of diffraction angles (2θ±0.1°), measured in powder X-ray crystallography, and melting temperature 192-197°C, as well as to novel crystals of type II of 1-(2'-cyano-2'-desoxy-β-D-arabinofuranosyl)cytosine monohydrochloride, which have characteristic peaks at 6.4°; 12.6°; 17.3° and 21.7° in form of diffraction angles (2θ±0.1°), measured in powder X-ray crystallography, and melting temperature 192-196°C, possessing anti-tumour properties.

EFFECT: invention relates to anti-tumour medication, containing claimed crystals, and to methods of obtaining crystals of type I and crystals of type II of 1-(2'-cyano-2'-desoxy-β-D-arabinofuranosyl)cytosine monohydrochloride.

7 cl, 3 dwg, 1 tbl, 5 ex