APIs for research and impurities

(6R)-Folinic acid is an impurity standard and a metabolite of folic acid. It is synthesized by the body in the liver, where it is converted to 5,10-methylenetetrahydrofolate (5,10-MTHF). This metabolite is used to convert homocysteine into methionine, which can then be converted into S-adenosylmethionine (SAMe), a compound that has been shown to have antidepressant properties. The methylation of folate also helps to regulate DNA synthesis and repair. (6R)-Folinic acid has been used in research as a drug development tool for studying folate metabolism and its effects on the central nervous system. High purity standards are available for use in HPLC analysis of this compound.

Bisoprolol impurity G is a metabolite of bisoprolol. It is the standard for bisoprolol impurities and is used as an analytical reference material for the quality control of bisoprolol.

Oxybutynin EP impurity B is a metabolite of oxybutynin and is a natural product. It is used as an analytical reference substance, to develop new drugs, and in pharmacopoeia in order to measure the purity of oxybutynin. The compound is synthesized by chemical synthesis and can be used as a standard for HPLC analysis.

(3R,5S,6E)-7-[4-(4-Fluorophenyl)-6-(1-methylethyl)-2-[methyl[(2-hydroxy-2-methylpropyl)sulfonyl]amino]-5-pyrimidinyl]-3,5-dihydroxy- 6-heptenoic acid sodium salt is a synthetic drug product. It is an impurity standard in the synthesis of Metabolism studies. The CAS number is 1714147-50-8 and the chemical name is (3R,5S,6E)-7-[4-(4-fluorophenyl)-6-(1-methylethyl)-2-[methyl[(2-hydroxy-2 methylpropyl)sulfonyl]amino]-5-pyrimidinyl]-3,5dihydroxyheptenoic acid sodium salt. The molecular weight is 781

(E,Z)-Epalrestat methyl ester is a drug product that is custom-synthesized for research and development purposes. It is a natural metabolite of (E,Z)-epalrestat acid. The chemical name for this compound is 3-[(2-chlorophenyl)methyl]-N-(1H-indol-3-ylmethylene)malonamide. The molecular weight of this compound is 284.87 g/mol and it has an empirical formula of C24H27ClN2O2. It has been found to inhibit the activity of phosphodiesterase (PDE), which plays a role in the breakdown of cyclic nucleotides such as cAMP and cGMP. This product has high purity and analytical data that can be used for metabolism studies or clinical trials.

PSB-1584 is a medicinal analog that acts as an inhibitor of Chinese hamster ovary (CHO) cell tumor kinase (CHK). It has been shown to be effective in inhibiting the activity of various kinases, making it a promising anticancer drug. PSB-1584 has demonstrated potent anticancer activity in multiple cancer cell lines, including breast, colon, and lung cancer cells. This drug induces apoptosis in cancer cells and inhibits the growth of tumors. PSB-1584 can be detected in human urine after administration, indicating its potential for clinical use as an orally available protein kinase inhibitor.

(±)-Voriconazole is an analog of voriconazole, which is a potent inhibitor of kinases that play a role in cancer cell growth and apoptosis. It has been shown to be effective against tumors in human and Chinese hamster cells. (±)-Voriconazole also inhibits angiotensin-converting enzyme (ACE), which may play a role in its anticancer activity. This drug has been found to have a low potential for toxicity and is well-tolerated by patients. It is excreted primarily through the urine and has been shown to be effective as an inhibitor of multiple kinases involved in cancer progression.

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Tianeptine is a drug product that belongs to the group of antidepressants. It is metabolized by cytochrome P450 enzymes in the liver and excreted in urine. Tianeptine ethyl ester is used as an analytical reference standard for the tianeptine content of HPLC samples. The CAS number for tianeptine ethyl ester is 66981-77-9.