Derivados de Purinas e Pirimidinas

<p>Applications 1,11b-Dedihydrotetrabenazine is a product of photolytic degradation of Tetrabenazine (T284000) which is a dopamine depleting agent.<br>References Bourezg, Z., et al.: J. Pharmaceut. Biomed., 91, 138 (2014); Schwartz, et al.: Biochem. Pharmacol., 15, 645 (1966); Janovic, J., et al.: Ann. Neurol., 11, 41 (1982); Janovic, J., et al.: Neurology, 38, 391 (1988);<br></p>

<p>Stability Very Hygroscopic<br>Applications A labelled metabolite of Temozolomide.<br>References Jaeken, J., et al.: Lancet, 2, 1058 (1984), Baggott, J., et al.: Biochem. J., 236, 193 (1986), Baggott, J., et al.: Arch. Dermatol., 135, 813 (1999),<br></p>

<p>Applications An impurity of the antiviral drug Oseltamivir (O700100). It is a COVID19-related research product.<br></p>

<p>Stability Very Hygroscopic<br>Applications Tenofovir (T018500) impurity.<br></p>

<p>Applications Fungal tyrosinases and their capability to oxidize peptide-bound tyrosine residues is important in a view of applicability of tyrosinases.<br>References Bowness, J., et al.: Biochem. J., 53, 620 (1953), Cuff, M., et al.: J. Mol. Biol., 278, 855 (1998), Kubo, I., et al.: Bioorg. Med. Chem., 12, 5349 (2004),<br></p>

<p>Stability Very Hygroscopic<br>Applications Tenofovir Dimer is a dimer of Tenofovir (T018500). Tenofovir is a reverse transcriptase inhibitor. Used as an anti-HIV agent.<br>References Shaw, J.-P., et al.: Pharm. Res., 14, 1824 (1997), Wyles, D., et al.: Clin Infect. Dis., 40, 174 (2005), Peng, J., et al.: J. Clin. Pharmacol., 46, 265 (2006), Seminari, E., et al.: J. Antimicrob. Chemother., 60, 831 (2007),<br></p>

<p>Applications D-Alanine Isopropyl Ester Hydrochloride is a chiral reagent used in the synthesis of nucleotide prodrugs such as (PSI-7977) for the treatment of hepatitis C. Also used in the preparation of synthetic sweeteners.<br>References Sofia, M. et al.: J. Med. Chem., 53, 7202 (2010); Mazur, R. et al.: J. Med. Chem., 16, 1284 (1973);<br></p>

<p>Applications 5-Carboxy-2'-deoxyuridine, is a derivative of Trifluridine, an anti-herpesvirus antiviral drug, used primarily on the eye.<br>References Kuster, P., et al.: CLAO J. 24(2), 122 (1998); O’Brien, W., Invest. Opthalmol. Vis. Sci., 32 (9), 2455 (1991);<br></p>

<p>Applications 4-Hydroxy-1,3-benzenedicarbonitrile is used in the preparation of febuxostat (F229000), a non-purine xanthine oxidase inhibitor used as a treatment for hyperuricaemia and chronic gout.<br>References Smith, C.J., et al.: Bioorg. Med. Chem. Lett., 20, 346 (2010); Cramp. S., et al.: BIoorg. Med. Chem. Lett., 20, 2516 (2010); Sato, T., et al.: Bioorg. Med. Chem. Lett., 19, 184 (2009);<br></p>

<p>Applications (S)-9-[2-(Hydroxypropyl] Adenine is an inhibitor of adenosine deaminase. (S)-9-[2-(Hydroxypropyl] Adenine is used in the preparation of antiviral acyclic nucleoside thiophosphonates such as (S)-Tenofovir Disoproxil Fumarate (T018506).<br>References Roux, L. et al.: Eur. J. Med. Chem., 63, 869 (2013); Schaeffer, H. et al.: J. Med. Chem., 15, 456 (1972); Schaeffer, H. &amp; Vince, R.: J. Med. Chem., 10, 689 (1967)<br></p>

<p>Applications Thiamine (T344185) impurity.<br></p>

<p>Applications Tenofovir is an acyclic phosphonate nucleotide analogue and reverse transcriptase inhibitor. It is used as an anti-HIV agent. Antiviral. Tenofovir (T018500) impurity.<br>References Shaw, J.-P., et al.: Pharm. Res., 14, 1824 (1997); Wyles, D., et al.: Clin Infect. Dis., 40, 174 (2005), Peng, J., et al.: J. Clin. Pharmacol.,  46, 265 (2006), Seminari, E., et al.:  J. Antimicrob. Chemother., 60, 831 (2007);<br></p>

<p>Applications A selective A2A adenosine receptor agonist in myocardial imaging.<br>References Palle, V.P., et al.: J. A. Drug Dev. Res., 50, 64 (2000), Gordi, T., et al.: J. Clin. Pharmacol., 47, 825 (2007), Zhao, G., et al.: J. Cardiovas. Pharmacol., 52, 467 (2008), Botvinick, E., et al.: J. Nuc. Med. Technol., 37, 14 (2009),<br></p>

<p>Applications This compound is an isomer of compound (E925685) used in the synthesis of neuraminidase inhibitors.<br>References Jarinrat K. et al.: Bioorg. Med. Chem. Lett., 20, 2152 (2012);<br></p>

<p>Stability Very Very Moisture sensitive<br>Applications Chloroformic Acid Chloromethyl Ester is used as a reagent in the synthesis of carbamates and carbonates.<br> Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package<br>References Safadi, M. et al.: Pharm. Res. 10, 1350 (1993); Loren, J.C. et al.: Synlett, 18, 2847 (2005);<br></p>

<p>Stability Hygroscopic<br>Applications One of the unknown impurities generated during the accelerated stability storage of Clopidogrel bisulfate tablets. Clopidogrel impurity.<br>References Gomez, Y., et al.: J. Pharm. Biomed. Anal., 34, 341 (2004), Ksycinska, H., et al.: J. Pharm. Biomed. Anal., 41, 533 (2006),<br></p>

<p>Applications The 5-aminopentyl amide derivative of the folic acid antagonist Methotrexate (M260675) used in the study of membrane-associated folate transporters from L1210 cells.<br>References Fan, J. et al.: J. Biol. Chem., 266, 14862 (1991);<br></p>

<p>Applications Dopamine depleting agent. An antidyskinetic; antipsychotic.<br>References Schwartz, et al.: Biochem. Pharmacol., 15, 645 (1966), Janovic, J., et al.: Ann. Neurol., 11, 41 (1982), Janovic, J., et al.: Neurology, 38, 391 (1988),<br></p>

<p>Applications (+)-9-deMe-DTBZ is a desmethyl derivative of Tetrabenzine (T284000), a dopamine depleting agent. An antidyskinetic; antipsychotic.<br>References Schwartz, et al.: Biochem. Pharmacol., 15, 645 (1966), Janovic, J., et al.: Ann. Neurol., 11, 41 (1982), Janovic, J., et al.: Neurology, 38, 391 (1988),<br></p>

<p>Applications 2-Pyrimidinemethanamine (cas# 75985-45-4) is a useful research chemical.<br></p>

<p>Applications 2-Hydroxy-N-(pyridin-4-yl)butanamide is a useful synthetic intermediate.<br></p>

<p>Applications Caffeine citrate (Cafcit) is a citrate salt of Caffeine, sometimes used in medical treatment, including short-term treatment of apnea of prematurity (lack of breathing in premature infants). Caffeine citrate functions in much the same capacity as does caffeine, but takes effect more quickly; its speed of dissociation is faster than that of Caffeine. Caffeine citrate is typically only used to treat severe migraines.<br>References Zubair, U.M., et al.: Anal. Profiles Drug Subs., 15, 71 (1986); Cherrah, Y., et al.: Biochem. Pharmacol., 37, 1311 (1988); Grillon, C., et al.: Clin. Neurophysiol., 114, 1557 (2003); Duangdao, D., et al.: Behav. Brain Res., 205, 1 (2009);<br></p>

<p>Applications Diethyl p-Toluenesulfonyloxymethylphosphonate is an antiviral agent and a Tenofovir (T018500) intermediate. Tenofovir is an acyclic phosphonate nucleotide analogue and reverse transcriptase inhibitor used as an anti-HIV agent.<br>References Shaw, J.-P., et al.: Pharm. Res., 14, 1824 (1997), Wyles, D., et al.: Clin Infect. Dis., 40, 174 (2005), Peng, J., et al.: J. Clin. Pharmacol., 46, 265 (2006), Seminari, E., et al.: J. Antimicrob. Chemother., 60, 831 (2007),<br></p>

<p>Applications A nicotinic acid derivative for prevention and treatment of cancer by activating RUNX3 gene.<br>References Ludwig, et al.: Cancer Res., 50, 2470 (1990), Gupta., et al.: Biomed. Environ. Sci., 13,122 (2000), Cai., et al.: J. Med. Chem., 46, 2474 (2003),<br></p>

<p>Applications Barbituric Acid (B118650) derivative with anti-convulsive properties. Controlled Substance.<br> Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package<br>References Carissime, M. et al.: Farmac. Edi. Sci., 17, 390 (1962); Harvey, D.J. et al.: Drug. Metab. Disp., 5, 527 (1977);<br></p>

<p>Stability Hygroscopic<br>Applications Methotrexate Hexaglutamate is a metabolite of Methotrexate (M260675); a folic acid antagonist, antineoplastic, and antirheumatic.<br>References Freeman, M.V., J. Pharmacol. Exp. Ther., 122, 154 (1958); Weinblass, M.E., et al.: N. Engl. J. Med., 312, 818 (1985)<br></p>

<p>Applications Labelled Urea. Physiological regulator of nitrogen excretion in mammals; synthesized in the liver as an end-product of protein catabolism and excreted in urine. Also occurs normally in skin. Emollient; diuretic.<br>References Demetriou, A., et al.: Science, 233, 1190 (1986), Aebischer, P., et al.: Nat. Med., 2, 696 (1996), Prakash, S., et al.: Biotechnol. Bioeng., 46, 621 (1995),<br></p>

<p>Stability Hygroscopic, Temperature Sensitive<br>Applications 4-[2-(4-Chlorobutylidene)hydrazinyl]-N-methylbenzenemethanesulfonamide is an intermediate in the synthesis of 3-(2-Aminoethyl)-N-methyl-1H-indole-5-methanesulfonamide (Didesmethyl Sumatriptan) (Sumatriptan EP Impurity E) (A609165), which is an antimigraine agent. A Sumatriptan intermediate.<br> Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package<br></p>

<p>Applications An impurity of Tenofovir (T018500(P)). Tenofovir is an acyclic phosphonate nucleotide analogue and reverse transcriptase inhibitor. It is used as an anti-HIV agent. Antiviral.<br>References Shaw, J.-P., et al.: Pharm. Res., 14, 1824 (1997); Wyles, D., et al.: Clin Infect. Dis., 40, 174 (2005), Peng, J., et al.: J. Clin. Pharmacol., 46, 265 (2006), Seminari, E., et al.: J. Antimicrob. Chemother., 60, 831 (2007);<br></p>

<p>Applications Valbenzine is a highly selective vesicular monoamine transporter 2 inhibitor. It is used in the treatment of tardive dykinesia.<br>References O'Brien, C. et al.: Movement Dis., 30, 1681 (2015);<br></p>

<p>Applications Benzofuran-6-carboxylic Acid is a reagent in the development of potent LFA-1/ICAM antagonist SAR 118 as an opthalmic solution for treating dry eyes. Preparation of piperidinylpyrimidine derivatives as inhibitors of HIV-1 LTR activation.<br>References Zhong, M., et al.: ACS Med. Chem., 3, 203 (2012); Fujiwara, N., et al.: Bioorg. Med. Chem., 16, 9804 (2008)<br></p>

<p>Stability Photosensitive<br>Applications It is used for the treatment of pancreatic cancer and acute myelogenous leukaemia (AML).<br></p>

<p>Applications Caffeine-D10 is the labeled compound of Caffeine(C080100). Caffeine (Pentoxifylline EP Impurity F) is a bitter, white crystalline xanthine alkaloid that acts as a stimulant drug and a reversible acetylcholinesterase inhibitor (1,2,3). Caffeine is found in varying quantities in the seeds, leaves, and fruit of some plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants. In humans, caffeine acts as a central nervous system stimulant, temporarily warding off drowsiness and restoring alertness. Caffeine is a cardiac and respiratory stimulant; diuretic. Caffeine is toxic at sufficiently high doses. Caffeine is a non-competitive inhibitor of acetylcholinesterase (3).<br> Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package<br>References Zubair, U.M., et al.: Anal. Profiles Drug Subs., 15, 71 (1986); Cherrah, Y., et al.: Biochem. Pharmacol., 37, 1311 (1988);<br></p>

<p>Applications m-Hydroxyhippuric Acid-13C2, 15N is labelled m-Hydroxyhippuric Acid (H943125) which is a metabolite of caffeic and chlorogenic acids in human.<br>References Booth, A., et al.: J. Biol. Chem., 229, 51 (1957); Gonthier, M., et al.: Biomed. Pharmacother., 60, 536 (2006)<br></p>

<p>Impurity Naratriptan Impurity F<br>Stability Hygroscopic<br>Applications 4-[1,5-Bis-(2-methylsulfamoylethyl)-1H-indol-3-yl]-1-methylpyridinium Chloride is an impurity of Naratriptan (N378730).<br></p>

<p>Applications [[(1R)-2-(6-Amino-9H-purin-9-yl)-1-methylethoxy]methyl]monophenylester is an antiviral agent and a Tenofovir (T018500) intermediate. Tenofovir is an acyclic phosphonate nucleotide analogue and reverse transcriptase inhibitor, used as an anti-HIV agent.<br>References Shaw, J.-P., et al.: Pharm. Res., 14, 1824 (1997); Wyles, D., et al.: Clin Infect. Dis., 40, 174 (2005); Peng, J., et al.: J. Clin. Pharmacol., 46, 265 (2006); Seminari, E., et al.: J. Antimicrob. Chemother., 60, 831 (2007);<br></p>

<p>Applications rac-Clopidogrel Hydrogen Sulfate is used in the synthesis of Clopidogrel derivatives as platelet aggregation inhibitors.<br>References Chen, J., et. al.: Hecheng Huaxue, 18, 586 (2010); Defreyn, G. et al.: Thromb. Haemo., 65, 186 (1991);<br></p>

<p>Applications A metabolite of Tetrabenazine in vivo, which is likely the active pharmacological agent. The cis isomer of Dihydrotetrabenazine is used for the treatment of hyperkinetic movement disorders.<br>References Kilbourn, M., et al.: Eur. J. Pharmacol., 278, 249 (1995), Perera, R., et al.: J. Med. Chem., 46, 2599 (2003), Mager, D., et al.: J. Pharm. Sci., 94, 2475 (2005), Zheng, G., et al.: Bioorg. Med. Chem., 16, 5018 (2006),<br></p>