1. A pharmaceutically acceptable salt of 1- (2-deoxy-2-fluoro-4-thio-β-D-arabinofuranosyl) tsitozina.2. Salt according to Claim. 1 which is a salt of an inorganic acid or sulfonat.3. . The salt according to claim 2, wherein the inorganic acid salt is a hydrochloride, hydrobromide, yodogidrat, nitrate, phosphate or sulfate and sulfonate is a methanesulfonate, benzenesulfonate, p-toluenesulfonate, or mezitilensulfonat naftalinsulfonat.4. . The salt according to claim 2, wherein the inorganic acid salt is a hydrochloride, yodogidrat, nitrate or sulfate It represents a sulfonate metansulfonat.5. . The salt according to claim 2, wherein the inorganic acid salt is the hydrochloride salt It represents a sulfonate metansulfonat.6. Crystal of methanesulfonate 1- (2-deoxy-2-fluoro-4-thio-β-D-arabinofuranosyl) cytosine, showing characteristic peaks at diffraction angles (2θ) 19.8, 21.8, 27.5, and 28.4 29.9 degrees with the X-ray powder diffractometry, the crystal or 1- (2-deoxy-2-fluoro-4-thio-β-D-arabinofuranosyl) cytosine, showing characteristic peaks at diffraction angles (2θ) 9,2, 14, 7, 15.7, 22.9 and 27.3 degrees when the X-ray powder difraktometrii.7. A pharmaceutical composition comprising a salt according to any one of claims. 1-5 or according to claim crystal. 6.8. A pharmaceutical composition according to claim. 7, intended for use in the treatment opuholi.9. A process for preparing a salt according to any one of claims. 1-5, which comprises the step of translation of 1- (2-deoxy-2-fluoro-4-thio-β-D-arabinofuranosyl) cytosine into a pharmaceutically acceptable salt thereof.1. Фармацевтически приемлемая соль 1-(2-дезокси-2-фтор-4-тио-β-D-арабинофуранозил)цитозина.2. Соль по п. 1, которая представляет собой соль неорганической кислоты или сульфонат.3. Соль по п. 2, где соль неорганической кислоты представляет собой гидрохлорид, гидробромид, йодогидрат, нитрат, фосфат или сульфат а сульфонат представляет собой метансульфонат, бензолсульфонат, п-толуолсульфонат, мезитил
