PHARMACEUTICAL SUBSTANCE, ITS PRODUCTION METHOD AND MEDICATION
FIELD: medicine, pharmaceutics. ^ SUBSTANCE: invention relates to chemistry and deals with a pharmaceutical substance based on hydroxiethylated starch, its production method and a pharmaceutical composition for production of a medication with volemic action. The invention may find application in che...
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Zusammenfassung: | FIELD: medicine, pharmaceutics. ^ SUBSTANCE: invention relates to chemistry and deals with a pharmaceutical substance based on hydroxiethylated starch, its production method and a pharmaceutical composition for production of a medication with volemic action. The invention may find application in chemistry and medicine. The pharmaceutical substance represents a water-soluble powder of amylopectin hydroxiethylated starch with ratio of substituted hydroxiethylated C2/C6 atom groups is equal to 2 - 20, average molecular weight (Mw) remaining within the range of 100-450 kDa and the substitution degree amounting to 0.25-0.75. For production of the pharmaceutical substance of hydroxiethylated starch one uses starch with amylopectin content equal to 60-98% that is hydrolysed in suspension with an acid until an inherent viscosity value []=0.10-0.2. The hydrolysed starch is dissolved in water at T=70-105C, hydroxiethylated in an inert gas atmosphere an alkylating agent and a catalyst until substitution degree is 0,25-0.75. The reaction mixture is neutralised; the produced solution is cleared of low-molecular fractions of hydroxiethylated starch and impurities by ultrafiltration method, filtered in a sterile way and dried. Additionally, the invention deals with a pharmaceutical composition for production of a medication with volemic action using the above method. ^ EFFECT: development of a pharmaceutical substance volemic action as well as optimisation of the pharmaceutical substance production method enabling regulation of substitution degree within the interval required, obtaining a favourable ratio of substituted hydroxiethyl groups. ^ 21 cl, 5 ex
Изобретение относится к химии и касается фармацевтической субстанции на основе гидроксиэтилированного крахмала, способа ее получения и фармацевтической композиции для получения лекарственного средства волемического действия. Изобретение может найти применение в химии и медицине. Фармацевтическая субстанция представляет собой растворимый в воде порошок амилопектинового гидроксиэтилированного крахмала с соотношением замещенных гидроксиэтилированных групп атомов С2/С6 от 2 до 20 и значением средней молекулярной массы Mw в пределах 100-450 кДа, при степени замещения 0,25-0,75. Для получения фармацевтической субстанции гидроксиэтилированного крахмала используют крахмал с содержанием амилопектина 60-98%, который гидролизуют в суспензии кислотой до значения характеристической вязкости [η]=0,10-0,2. Растворяют гидролизованный кр |
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