APIs pour la recherche et les impuretés

4-[2-(Tetrazol-5-yl)phenyl] phenyl]methyl is a metabolite of the drug product 4-(1-Hydroxy-1-methylethyl)-2-propyl-1[4-[2-(tetrazol-5-yl)phenyl]phenyl]methyl imidazole-5-carboxylate. 4-[2-(Tetrazol-5-yl)phenyl] phenyl]methyl is a yellowish solid with a melting point of 128°C and a molecular weight of 246.8 g/mol. The impurity standard for 4-[2-(Tetrazol-5-yl)phenyl] phenyl]methyl is available in the form of an analytical grade, HPLC standard, or pharmacopoeia grade.

Darunavir Urea Impurity is an impurity of Darunavir which is used in the treatment of HIV. It is produced as a result of the metabolism of Darunavir by Cytochrome P450 enzymes. This impurity has been shown to be present in drug products that contain Darunavir and are manufactured using a process involving the use of urea. The CAS number for this impurity is 557-87-2.

Captopril EP Impurity H is a drug product that is used as an analytical reference standard. It is not intended for administration to humans or animals. Captopril EP Impurity H is manufactured by the same process as Captopril, but with a different impurity profile. The purity of this product is 99.5% at 25°C, and it has an impurity profile of less than 0.5%. This product is also known as 4-Amino-N-(2,6-dichlorophenyl)benzenesulfonamide and has CAS No. 205521-07-9.

Monophenyl succinate is an organic compound that is a derivative of succinic acid. It contains a hydroxyl group, which reacts with hydrogen chloride to form a cross-linking agent. The diameters of the particles are between 1 and 100 nm. Monophenyl succinate can be used as a cross-linking agent in polymers and coatings, as well as an antihypertensive drug. The hydroxy group on the monophenyl group has ester linkages with the methyl and ethoxycarbonyl groups on the phenyl group. This compound also has methoxy groups and chlorine atoms attached to it. The reaction products of this compound are hydrogen chloride, hydroxyl group, and diameter.

N5-(5-Hydroxy-4,6-dimethyl-2-pyrimidinyl)-L-ornithine hydrochloride hydrate is a monoclonal antibody that is specific to lysine residues. It can be used in cancer tissue identification and detection of reactive cells. The formation rate of this antibody is dependent on the concentration of trifluoroacetic acid. N5-(5-Hydroxy-4,6-dimethyl-2-pyrimidinyl)-L-ornithine hydrochloride hydrate reacts with the amino group of lysine residues at pH 7.4 and has a logistic regression coefficient of 0.934 (95% confidence interval: 0.837 - 1.000). This antibody is also able to bind to pluripotent cells, which are cells capable of differentiating into any cell type, including neural cells in diabetic neuropathy patients and chaperones in biological samples.

Xanthosine, made by some bacteria, is a purine metabolism intermediate, evolving from IMP to GMP.