摘要:
A metabolic controlled fermentation process has been developed for the production of carbamoyl tobramycin by the application of different Streptocmyces tenebrarius strains in submerged cultures at a temperature within about 37-41°C on a medium containing assimilable carbon and nitrogen sources, mineral salts and controlling the assimilable carbon and nitrogen sources by feeding in an optimal range. As a result of this invention a high yield production of carbamoyl tobramycin with high purity could be achieved.
摘要:
The present invention provides pravastatin sodium substantially free of pravastatin lactone and epiprava, the C-6 epimer of pravastatin. The present invention further provides a novel process for recovering pravastatin sodium from a fermentation broth in such high purity. The process includes the stages of forming an solution of the compound by extraction, obtaining an ammonium salt of pravastatin from the solution, purifying the ammonium salt of the compound and transposing the salt of the compound to pravastatin sodium.
摘要:
A process reducing the levels of dimeric impurities in a statin to less than 0.08 % by treatment of a statin containing more than 0.08 % dimeric impurities with a mild base in a suitable solvent mixture.
摘要:
Subject of the invention is a molecule characterised by general structure (1), where meaning of x: 1 or 2 valency metallic ion adequate from therapeutic point of view, value of n: 1 or 2, or the application of its metabolite being suitable for the treatment or prevention of embryonic retardation or discordance.
摘要:
The invention relates to an oral multiple emulsion pre concentrate comprising a surface active agent, ethanol a lipophilic and/or an amphiphilic solvent. The composition comprising from about 5 to about 30 % by weight of cyclosporin, from about 5 to about 30 % by weigh of tocopheryl polyethylene glycol carboxylic acid ester, from about 5 to about 20 % by weight of ethanol, from about 20 to about 55 % by weight of a lipophylic solvent and/or from about 10 to about 55 % by weight of an amphiphilic solvent, and if desired from about 10 to about 20 % by weight of co-tenside.
摘要:
The present invention relates to a process for producing recombinant desulphatohirudin by means of culturing microorganisms. Concerning the codon usage of microorganisms the synthesized nucleotide sequences were joined downstream of and in reading frame with isolated promoters and signal sequences, subsequently the expression/secretion cassettes comprising the foregoing elements were inserted into plasmid DNAs allowing the cultivation of cells under selective culture conditions. E. coli, Saccharomyces and Streptomyces species were transformed with the said recombinant plasmids to biosynthesize the thrombin inhibitor desulphatohirudin HV-1 which was then isolated and identified. The thus-produced desulphatohirudin can be used to inhibit blood coagulation.
摘要:
The invention relates to a process for the synthesis of 1H-imidazo[4,5-c] quinoline 4-cyano and 1H-imidazo[4,5-c] quinoline 4- carboxamide intermediates useful in preparing 1H-imidazo[4,5-C] quinoline 4-amines, a process for preparing 1H-imidazo [4,5-C] quinoline 4-amines using such intermediates; and, to the 1H-imidazo[4,5-c] quinoline 4-cyano and 1H-imidazo[4,5-c] quinoline 4- carboxamide intermediates. More particularly, the invention relates to a process for the preparation of 1-isobutyl-1H-imidazo [4,5-C] quinoline 4-amine (Imiquimod) using two intermediates, 1-isobutyl-1H-imidazo[4,5-c]quinoline 4-cyano and 1-isobutyl-1H-imidazo[4,5-c]quinoline 4-carboxamide, and to the said intermediates.
摘要:
New polymorphic forms of pravastatin sodium are provided. Each of the new forms is selectively obtained by crystallization from different solvent systems, each solvent system having a protic component, and by controlling the rate of crystallization through temperature. The new polymorphic forms are suitable for use as active substances of pharmaceutical dosage forms for reduction of serum cholesterol levels in the bloodstream.