API & Intermediate

This product is obtained from natural plants through refining and purification. Zeaxanthin is a strong antioxidant. It can also protect tissues and cells by quenching singlet oxygen and scavenging free radicals, so as to protect biological systems from potential harmful effects caused by excessive oxidation reaction.

Rifamycin o (rifaximin EP impurity f) is an intermediate of rifaximin.

There are three stereoisomers of tartaric acid: tartaric acid, L-tartaric acid and racemic tartaric acid. Racemic tartaric acid is a mixture of the same amount of dextrosome and levosome whose optical activity counteracts each other. Racemates do not exist in nature and can be synthesized chemically. All kinds of tartaric acid are colorless crystals which are easily soluble in water. Tartaric acid is widely used as an Acidifier in beverages and other foods, similar to citric acid. Tartaric acid and tannin can be used as mordant of acid dyes, as well as in some developing and fixing operations in the photographic industry. Its iron salt is photosensitive, so it can be used to make blueprints. Tartaric acid can complex with many kinds of metal ions and can be used as cleaning agent and polishing agent for metal surface. Potassium and sodium tartrate (Rochelle salt) can be used as ferin reagent, medicine, laxative and diuretic, and intermediate of cinchofen. The crystal has piezoelectric properties and can be used in electronic industry. Therefore, this product is mainly used in beverage, candy, bread and gelatin as sour agent, biochemical reagent, racemic resolution agent and pharmaceutical resolution agent.

Cytarabine is a kind of purine nucleoside antiviral drug which is extracted from Streptomyces culture medium and synthesized by chemical method. It is slightly soluble in water, and its monophosphate is easily soluble in water. It can inhibit HSV1 and HSV2, hepatitis B virus, varicella zoster virus and cytomegalovirus, but has no effect on smallpox virus, adenovirus, other DNA or RNA viruses, bacteria and fungi. At present, the exact mechanism of cytosine arabinoside antiviral has not been fully elucidated, which is mainly related to the inhibition of virus replication. Drugs and their metabolites block the synthesis of viral DNA by inhibiting viral DNA polymerase, while drugs only penetrate into viral DNA molecules in a very small amount. Cytarabine is also one of the most effective drugs for the treatment of acute non lymphocytic myeloid leukemia in China.

Rosuvastatin calcium is an anti hyperlipidemic drug, which is a HMG CoA reductase inhibitor. It is successfully developed by AstraZeneca in the UK. It is suitable for the treatment of a variety of lipid disorders, including hypercholesterolemia, mixed lipid disorders and simple hypertriglyceridemia. Rosuvastatin calcium is one of the most effective and comprehensive lipid-lowering drugs on the market. Compared with the most effective atorvastatin in the world, rosuvastatin calcium has better effects in reducing LDL-C and increasing HDL-C, and has better tolerance, lower side effects and unique pharmacokinetic characteristics. Its half-life is about 20h, Just take it once a day.