APIs pour la recherche et les impuretés

D-Asp(9)-Semaglutide is a semaglutide impurity. The amino acid at position 9 has been replaced by the D-form of the amino acid D-aspartic acid (D-Asp). Semaglutide impurities are structurally related compounds that arise during synthesis, purification, or storage of semaglutide, a long-acting GLP-1 receptor agonist for managing type 2 diabetes and obesity.

D-Arg(28)-Semaglutide is a semaglutide impurity. The amino acid at position 28 has been replaced by the D-form of the amino acid D-arginine (D-Arg). Semaglutide impurities are structurally related compounds that arise during synthesis, purification, or storage of semaglutide, a long-acting GLP-1 receptor agonist for managing type 2 diabetes and obesity.

2-Nitroacetamide sodium salt is an impurity of the drug N-[2-[[[5-[(dimethylamino)methyl]-2-furanyl]methyl]thio]ethyl]-2-nitroacetamide, a synthetic chemotherapeutic agent for the treatment of cancers. This compound has been shown to have metabolism studies and natural properties. It has a CAS number of 112251-56-6 and is found in the pharmacopoeia. 2-Nitroacetamide sodium salt is a custom synthesis that can be used as a reference standard for HPLC analysis. It can also be used as a drug product or metabolite in drug development.

Methylisothiourea is a label that can be used to identify cells in vivo. It is a fluorescent molecule that is activated by the presence of cytokines, such as IL-1β and TNF-α. Methylisothiourea has been used to evaluate corneal epithelial cells for their response to injury. The effect of Methylisothiourea on the tissue was assessed by histology and evaluated by the presence of cytokine concordance with the fluorescence intensity. Reconstitution experiments were conducted in vitro using human tissues. It was found that Methylisothiourea was not toxic at concentrations up to 500 μM and that it did not interfere with DNA synthesis or cell division at concentrations up to 10 mM.

Naltrexone impurity A is a synthetic, high-purity drug product that is used as an analytical reference standard in the development and manufacture of pharmaceuticals. It is also used as a pharmacopoeia reference standard and to study metabolism. Naltrexone impurity A has been shown to be a major metabolite of naltrexone and can be found in the urine at concentrations of 1-2% following oral administration. This impurity is not active when given orally, but may have activity if injected intravenously or intramuscularly.

Lisdexamfetamine dimesylate impurity C is a drug product that is an analytical standard. It is a synthetic impurity found in the drug Lisdexamfetamine Dimesylate, which is used for the treatment of ADHD and narcolepsy. Lisdexamfetamine Dimesylate Impurity C has been shown to be metabolized through oxidation by cytochrome P450 enzymes and conjugation with glucuronic acid. The impurity has been shown to have no effect on the pharmacological activity of the parent compound.