Benzimidazole and Imidazole Derivatives

<p>Albendazole sulfone is a metabolite of the drug albendazole. It is used as an analytical standard to measure the concentration of albendazole in human plasma and urine samples. The concentration-time curve for albendazole sulfone can be determined using a nonlinear regression analysis, with the rate constant being calculated from the slope and intercept. This method has been shown to be accurate for predicting pharmacokinetic parameters in humans. Albendazole sulfone is also used as a probe in wastewater treatment studies, where it binds to colloidal gold particles that are used to visualize the removal of small particles by microorganisms.</p>

<p>2-[(4-Chloro-3-methyl-2-pyridinyl)methylthio]-1H-benzimidazole is a drug product. It is an impurity standard for the analytical determination of 2-[(4-chloro-3-methylpyridin)-2yl]thiohydantoin in pharmaceuticals and other chemical products. This compound is also used as a research and development (R&amp;D) metabolite and impurity standard for the synthesis of 4-(4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)pyridine. The CAS number for this compound is 103312-62-5./END&gt;</p>

<p>Scopine-2,2-dithienyl glycolate is a catalyst that belongs to the class of dithienyl glycolates. Scopine-2,2-dithienyl glycolate is used in the pharmaceutical industry as an average catalyst for reactions and can be used to recover dimethylbenzene. The method of detection for scopine-2,2-dithienyl glycolate is based on its ability to absorb light at a wavelength of 360 nm. The reaction solution must be monitored carefully during the synthetic process because it has been shown that it can react with water or air and form hydrogen sulfide gas. If this happens, the reaction solution will become cloudy or turbid. This product is a white crystalline solid that appears as tiny needles and has a melting point of 173 degrees Celsius (340 degrees Fahrenheit).</p>

<p>Oxybutynin EP impurity A is a metabolite of oxybutynin, an antispasmodic drug. It has been shown to have immunomodulatory effects in a rat model of adjuvant arthritis. Oxybutynin EP impurity A is the major metabolite of oxybutynin and has been shown to be pharmacologically active in humans.</p>

<p>Lactose conjugate degradation product of pregabalin</p>

<p>Amino albendazole sulfone is an anthelmintic drug that is used to treat worm infestations in animals. It is the active metabolite of fenbendazole sulfone and has a terminal half-life of 12 hours in humans. Amino albendazole sulfone can be prepared by chromatographic methods, such as liquid chromatography or gas chromatography, and it can be analyzed with a fluorescence detector. This drug has been shown to have a concentration–time curve following administration to rats and results in an increase in the number of worms eliminated from the body.</p>

<p>Lansoprazole impurity H is a metabolite of lansoprazole, a proton pump inhibitor that inhibits the production of stomach acid. Lansoprazole impurity H is used in research and development as an analytical standard to measure lansoprazole concentrations in drug products. It is also used as an impurity standard for pharmacopoeia purposes. Lansoprazole impurity H is not known to be toxic, but it has not been evaluated for carcinogenicity or reproductive toxicity.</p>

<p>2-Methoxy-5-methyL-N,N-bis(1-methyLethyl)-gamma-phenyLbenzenepropanamine fumarate (DMXBPC) is an analgesic that has been shown to be a potent inhibitor of the cytosolic phospholipase A2 and is also cytotoxic. DMXBPC has significant cholinergic activity and can inhibit the synthesis of prostaglandins in the prostate gland. DMXBPC binds to the pyridine ring of DOPA and inhibits its conversion to dopamine. The enantiomers of DMXBPC have different effects on inhibition of phospholipase A2, with the (+) form being more potent than the (-) form. This is due to the fact that (+)DMXBPC binds more tightly to the enzyme than (-)DMXBPC does.</p>

<p>2,12-Dihydro-1,3-dimethyl-9-methoxy-12-thioxobenzo [4,5] pyrido [1,2-c] imidazo [1,2-a] imidazol-2-one is a synthetic compound that has not been evaluated in humans. This compound is an impurity standard for the synthesis of an API. The purity of this compound is &gt;98% and it has been shown to be stable under acidic conditions.</p>

<p>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.</p>

<p>Impurity 65 is an impurity of Omeprazole, a drug used to treat gastroesophageal reflux disease and peptic ulcer. Impurity 65 is a metabolite of Omeprazole that can be found in the drug product at a concentration up to 0.5%. It has been shown to have anti-inflammatory effects and can be used as a research and development standard for HPLC analysis. Impurity 65 is also used as an impurity standard in the USP pharmacopoeia and other pharmacopoeias around the world.</p>

<p>2-Hydroxy-5-methylphenylbenzenepropanol is an aliphatic phenol that is used as a treatment for benzene poisoning. It is also used as a precursor to other compounds, such as the chlorides and alkylates of 2-hydroxy-5-methylphenylbenzenepropanol. This compound can be synthesized by reacting ethyl benzoylacetate with diisopropylamine in the presence of oxygen and chlorine gas. It is often immobilized using nutrients, l-tartaric acid, or cinnamic acid.</p>

<p>Tiotropium Bromide EP Impurity G is an anticholinergic bronchodilator that is used in the treatment of asthma. Tiotropium Bromide EP Impurity G has been shown to have long-acting properties, with a half-life of about 20 hours. It has a high affinity for the muscarinic receptor and acts as a competitive antagonist at this site. Tiotropium Bromide EP Impurity G also has a cavity, which may be necessary for its activity.</p>

<p>2-Methoxy-5-methyl-gamma-phenylbenzenepropanol is a synthetic compound that is used as an intermediate in the synthesis of coumarin derivatives. Reaction with sulfonating agents produces sulfones, and reaction with borohydride reagents produces boronates. The synthesis of 2-methoxy-5-methyl-gamma-phenylbenzenepropanol can be accomplished by the reduction of diphenyl ethers with lithium aluminum hydride or borohydride. The reduction can also be carried out using lanthanum oxide and potassium borohydride. The reaction proceeds smoothly at room temperature in nonpolar solvents.<br>2-Methoxy-5-methyl-gamma-phenylbenzenepropanol reacts with chloride to produce the corresponding chlorides, which are useful intermediates for the synthesis of tolterodine tartrate, a drug used to treat urinary inc</p>

<p>Pantoprazole sulfone N-oxide is a prodrug that is converted to the active form pantoprazole in the stomach where it inhibits gastric acid secretion. Pantoprazole sulfone N-oxide has been shown to be genotoxic, and can cause polyvinyl chloride to degrade when stored together. Reconstituted solution of this drug should be used within 24 hours after reconstitution, as the chemical stability of this drug decreases rapidly. Validation studies have been conducted on different analytical methods for determining pantoprazole concentrations in reconstituted solutions, and these methods have been harmonized with those published by the United States Pharmacopeia (USP). The pump inhibitor activity of pantoprazole sulfone N-oxide has been demonstrated in dogs, and it is also useful for treating acid reflux disease in humans. Pantoprazole sulfone N-oxide is unstable at high temperatures (&gt;25°C), so should not be refrigerated or</p>

<p>(4R)-1-(4-O-b-D-Galactopyranosyl-b-D-glucopyranosyl)-4-(2-methylpropyl)-2-pyrrolidinone is a synthetic, impurity standard and research and development compound. (4R)-1-(4-O-b-D-Galactopyranosyl-b-D-glucopyranosyl)-4-(2-methylpropyl)-2pyrrolidinone is used as an analytical reference in the synthesis of other compounds. It is also used in drug development for the treatment of tuberculosis. This product has a high purity level and is pharmacopoeia grade.</p>

<p>N,N-Dimethylaminoethyl-a-(1-Hydroxycyclopentyl)phenylacetate hydrochloride (DMAEA) is a drug that is used as an ophthalmic. It has been shown to be safe and effective in patients with chronic open angle glaucoma, and it may also have some efficacy for the treatment of other conditions such as uveitis and retinal detachment. DMAEA is thought to work by binding to the DNA in the eye’s optic nerve cells and blocking the production of leukotrienes. This drug has also been shown to have anti-inflammatory properties.</p>

<p>1-Phenyl-1,2,3,4-tetrahydro-isoquinoline is a synthetic compound which has been used as a lead compound for the development of drugs with dopamine β-hydroxylase inhibitory activity. In vitro studies have shown that 1-phenyl-1,2,3,4-tetrahydro-isoquinoline inhibits human serum dopamine β-hydroxylase and can be used to study the possible role of this enzyme in Parkinson's disease. This drug is racemized in the body and has been found to be effective against Parkinson's disease in rats. It is also an enantiomer that has industrial applications for the production of polyurethane foam insulation coatings.</p>

<p>Ethyl (S)-1-phenyl-1,2,3,4-tetrahydro-2-isoquinolinecarboxylate is an analytical standard used to identify impurities in drug products. It is a metabolite of the drug product and has been shown to be safe for human consumption. The compound is a synthetic chemical that is not found naturally in the environment. CAS No. 180468-42-2</p>

<p>1-[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]-2-[(4-(3-methoxypropoxy)-3-methyl-2-pyridinyl)methylsulfonyl]-1H-benzimidazole (MKC1807) is a synthetic drug product. MKC1807 is an analytical standard in the HPLC assay for the determination of Epiandrosterone sulfate and its metabolites. 1-[4-(3-Methoxypropoxy)-3,5,6,7,8 -pentamethylcyclohexyl]methyl 2-[(4-(3 -methoxypropoxy) 3,5,6,7,8 -pentamethylcyclohexyl)methylsulfonyl]-1H benzimidazole has been shown to be a natural metabolite of Epiandrosterone sulfate. This compound</p>