APIs pour la recherche et les impuretés

<p>Cetirizine metabolite</p>

<p>This is a metabolite of guaifenesin, and it is an impurity in the EP guaifenesin. It can be custom synthesized for research and development purposes. The purity of this product is high, and it can be used as an analytical standard or a drug product.</p>

<p>Decitabine impurity 14 is an impurity of decitabine. It is a stable, natural product that has been synthesized for use as an analytical standard and pharmacopoeia reference material. Decitabine impurity 14 is a white crystalline powder with a melting point of about 152°C. It is soluble in water, ethanol and ether. The chemical name for this compound is 2-amino-4,6-dihydroxypyrimidine-5-carbonitrile hydrochloride.</p>

<p>Tacrolimus is a macrolide that is used as an immunosuppressive drug. It has been shown to bind to the FK-binding protein, which in turn inhibits calcineurin. This prevents the release of IL-2, TNF-α and other cytokines. The immunosuppressive effects of tacrolimus have been evaluated using analytical methods such as coefficients, affinity, and monitoring techniques such as immunoassays and agglutination. These techniques are used to evaluate the plasma concentration of tacrolimus. Tacrolimus also binds to proteins in the blood samples and can be detected by turbidimetric or electrochemiluminescence immunoassay reagents.</p>

<p>(S)-Phenylephrine hydrochloride is a chiral sulfate salt of phenylephrine that is used as a bronchodilator. It has been shown to inhibit cell growth in the presence of sulfate and has been studied for its effects on the respiratory cycle. The compound was also investigated for possible use in treating liver cancer and showed promising results. Chromatograms of hepg2 cells, human liver cells, and liquid chromatography lysates revealed the presence of salbutamol, which is a metabolite of (S)-phenylephrine hydrochloride.</p>

<p>3',5'-Di-O-p-chlorobenzoyl-2-deoxy-5-azacytosine is a drug product that is an impurity in the synthesis of 5'-azacytosine. The chemical name for 3',5'-Di-O-p-chlorobenzoyl-2-deoxy-5-azacytosine is 3,3'-di(O,O'-dichlorobenzyl)-2,5'-dideoxycytidine. It has a molecular weight of 302.7 g/mol and a melting point of 130°C. This chemical compound has been shown to be metabolized by human liver microsomes to a number of metabolites, including 2-, 3-, and 4-(hydroxymethyl)uracil and 4-(aminomethyl)uracil. 3',5'-Di-O-p-chlorobenzoyl -2 deoxy</p>