APIs pour la recherche et les impuretés

Cimetidine is a histamine-2 receptor antagonist that inhibits gastric acid secretion and reduces the activity of stomach enzymes. It is used to treat peptic ulcers, gastroesophageal reflux disease, and Zollinger-Ellison syndrome. Cimetidine has been shown to inhibit the activity of drug-metabolizing enzymes such as cytochrome P450. Cimetidine also inhibits the transport protein P-glycoprotein (P-gp), which leads to increased concentrations of some drugs in the blood and tissues. This inhibition may lead to an increase in cardiac effects with certain drugs, such as x-ray diffraction data with taxol or h1 antagonists.

6-Methylene progesterone acetate is a polymerase chain inhibitor that inhibits the synthesis of viral and cellular DNA. It was first isolated from infected cells in tissue culture and has been shown to inhibit the growth of a wide range of viruses, including rabies, herpes simplex, herpes zoster, cytomegalovirus, varicella-zoster virus, and vesicular stomatitis virus. 6MPAA also blocks the production of gene products in mammalian cells by preventing RNA synthesis. This drug can be used as an antiviral agent for treatment of enteritis caused by rotavirus infection. 6MPAA binds to gp2 protein on the surface of virus particles and prevents this protein from interacting with polyclonal antibodies or monoclonal antibodies to prevent antibody response.

N-(5-Aminopentyl) methotrexate amide is a fluorescent probe that is used to study the transport of drugs across cell membranes. It binds to the plasma membrane of cells and can be visualized with a fluorescence microscope. N-(5-Aminopentyl) methotrexate amide has been shown to bind to leukemia cells in murine leukemia models. It has a high affinity for drug-resistant cells, which makes it useful for studying drug resistance mechanisms. This probe can be used at nanomolar concentrations for imaging studies, as well as for measuring the uptake of drugs into cancer cells by flow cytometry.

6-(2,4-Dichlorophenyl)-1,2,4-triazine-3,5-diamine is a metabolite that can be found in the urine and blood of humans. It has been shown to have cytotoxic effects on human lymphocytes and erythrocytes. 6-(2,4-Dichlorophenyl)-1,2,4-triazine-3,5-diamine is used as an impurity standard for HPLC analysis and as a reference compound for pharmacopoeia. This chemical is also used in the synthesis of some drugs. 6-(2,4-Dichlorophenyl)-1,2,4-triazine-3,5-diamine is not listed in any pharmacopoeia or natural product database.

Pantoprazole sulfide N-oxide is a metabolite of pantoprazole, which is a proton pump inhibitor used to reduce stomach acid production. Pantoprazole sulfide N-oxide is an impurity in pantoprazole that can be detected by HPLC. It has been shown to have about the same biological activity as pantoprazole when given orally.