Derivati delle Purine e Pirimidine

<p>Applications Allopurinol is a xanthine oxidase inhibitor; decreases uric acid production. Used in treatment of hyperuricemia and chronic gout. Antiurolithic.<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 Benezra, S.A., et al.: Anal. Profiles Drug Subs., 7, 1, (1978); Dalbeth, N., et al.: Rheumatology, 44, 1090 (2005); Dinarello, C., et al.: J. Exp. Med., 201, 1355 (2005);<br></p>

<p>Applications Used in the biological study of differentiation induced by nicotinic acid, nicotinamide and isonicotinic acid in human leukemia cell lines.<br>References Zeilinger, S., et al.: J. Biol. Chem., 271, 25624 (1996), Panagiotou, G., et al.: J. Biotechnol., 118, 304 (2005),<br></p>

<p>Stability Hygroscopic<br>Applications Methotrexate-d3 Triglutamate is the isotope labelled analog of Methotrexate Triglutamate (M260725); a metabolite of Methotrexate (M260675) which is 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 A metabolite of Temozolomide, an antineoplastic.<br></p>

<p>Applications 5-Amino-N1-methyl-1H-imidazole-1,4-dicarboxamide is a metabolite of Temozolomide (T017775); an imidazotetrazine alkylating agent and antineoplastic.<br>References Newlands, E.S., et al.: Cancer Treat. Rev., 23, 35 (1997); Kim, C., et al.: J. Biol. Chem., 274, 1233 (1999); Hait, W., et al.: Cancer Res., 69, 1263 (2009); Wang, Y., et al.: J. Org. Chem., 62, 7288 (1997)<br></p>

<p>Stability Hygroscopic<br>Applications 7-Methyl Memantine is an impurity of Memantine (HCl salt, M218000) which is used as an antiparkinsonian and antispasmodic.<br>References Rohde, H., et al.: Fortschr. Med., 100, 2023 (1982), Kornhuber, J., et al.: Eur. J. Pharmacol., 166, 589 (1989), Gortelmeyer, R. and Erbler, H.: Arzneimittel-Forsch., 42, 904 (1992)<br></p>

<p>Applications Purine (cas# 120-73-0) is a useful research chemical.<br></p>

<p>Applications Urea-urethane Compound is a reaction product of 4,4'-sulfonylbis[benzenamine] and 2,4-TDI.<br></p>

<p>Stability Hygroscopic<br>Applications It is a potent and selective inhibitor of bacterial dihydrofolate reductase, the enzyme responsible for the NADPH-dependent reduction of 7,8-dihydrofolate to 5,6,7,8-tetrahydrofolate. Antibacterial.This compound is a contaminant of emerging concern (CECs).<br>References Manius, G.J., et al.: Anal. Profiles Drug Subs., 7, 445 (1978), Roth, B., et al.: J. Med. Chem., 23, 379 (1980), Brogden, R.N., et al.: Drugs, 23, 405 (1982),<br></p>

<p>Applications N-(6-Amino-3-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)acetamide is an intermediate in synthesizing 5-Acetylamino-6-formylamino-3-methyluracil (A168210), which is a metabolite of Caffeine (C080100).<br>References Grant, D.M., et al.: Clin. Pharm. and Ther., 33, 591 (1983),<br></p>

<p>Applications Caffeine-d3 (1-methyl-d3) (CAS# 26351-03-1) is a useful isotopically labeled research compound.<br></p>

<p>Impurity Tenofovir Disoproxil USP Related Compound B<br>Applications 9-Propenyladenine (Tenofovir Disoproxil USP Related Compound B) is an N-substituted purine and an impurity of Tenofovir (T018500). Tenofovir Disoproxil Related Compound B ((E)-9-(Prop-1-enyl)-9H-purin-6-amine).<br>References Montgomery, J.A. et al.: J. Org. Chem., 30, 3235 (1965);<br></p>

<p>Applications Isotope labelled analog of Xanthine (X499950), a substance that can be found in animal organs, yeast, patatoes, coffee beans, tea. Xanthine can be used to relax and widen certain breathing passages of the lungs. It is also found that a large number of derivatives that exhibits adenoside receptor antagonist properties.<br>References Mueller, C. et. al: Handbook Exp. Pharmacol. 200,151(2011)<br></p>

<p>Applications Caffeine-13C3 is a labelled analogue of Caffeine (C080100), a bitter, white crystalline xanthine alkaloid that acts as a stimulant drug and a reversible acetylcholinesterase inhibitor. 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.A study at Johns Hopkins University indicates that caffeine can improve pattern separation memory.<br>References Zubair, U.M., et al.: Anal. Profiles Drug Subs., 15, 71 (1986); Cherrah, Y., et al.: Biochem. Pharmacol., 37, 1311 (1988);  Chem. and Eng. News p.34, Jan. 20, (2014)<br></p>

<p>Impurity Methotrexate EP Impurity D<br>Applications N10-Methyl Pteroic Acid (Methotrexate EP Impurity D) is a Methotrexate (M260675) impurity D.<br>References Cramer, S., et al.: Cancer Res. 1984, 44, 1843 (1984), Hendel, J., et al.: Eur. J. Clin. Pharmacol., 26, 103 (1984),<br></p>

<p>Applications Ondansetron is a specific serotonin (5-HT3) receptor antagonist. Antiemetic.<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 Kris, M.G., et al.: J. Clin. Oncol., 6, 659 (1988); Faris, P..L., et al.: Lances, 355, 792 (2000)<br></p>

<p>Applications Sulbutiamine (isobutyryl thiamine disulfide) is a lipophilic derivative of thiamine used for the treatment of asthenia and other related pathological conditions. Sulbutiamine is available over-the-counter in several countries as a component of nutritional supplements.<br>References Micheau, J., et al.: Pharmacol. Biochem. Behav., 23, 195 (1985), Bettendorff, L., et al.: Biochem. Pharmacol., 40, 2557 (1990), van Reeth, O., et al.: Drugs Today, 35, 187 (1999),<br></p>

<p>Applications Methotrexate-d3 Diglutamate is the isotope labelled analog of Methotrexate Diglutamate (M260720); a metabolite of Methotrexate (M260675) which is 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 (S)-Tenofovir is an S-enatiomeric derivative of Tenofovir (T018500). (S)-Tenofovir displays virucidal activity against herpes, visna virus and retrovirus. The S enantiomer of Tenofovir (T018500) is less effective against HIV than their (R)-enantiomeric counterparts.<br>References Balzarini, J. et al: Biochem. Biophys. Res. Comm., 219, 337 (1996); Balzarini, J. et al.: Antimicrob. Agents. Ch., 37, 332 (1993); Thormar, H. et al.: Antimicorb. Agents. Ch., 37, 2540 (1993)<br></p>

<p>Impurity Methotrexate EP Impurity C; Methotrexate USP Related Compound C<br>Applications Methopterine (Methotrexate EP Impurity C) is a Folic acid (F680300) analogue. Methopterine is effective in the treatment of ectopic pregnancy. Methotrexate USP Related Compound C<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 McNamara, P., et al.: Drug Metab. Dispos., 20, 302 (1992), Soldin, O., et al.: Ther. Drug Monit., 24, 1 (2002), Nicoli, S., et al.: J. Pharm. Biomed. Anal., 41, 994 (2006),<br></p>

<p>Impurity Temozolomide USP Related Compound A<br>Applications Temozolomide USP Related Compound A<br></p>

<p>Applications A Nicotinic acid (N429250) derivative for treatment of hypercholesterolemia and hyperlipidemia and cardiovascular disease.<br>References Hales, N.J., et al.: J. Med. Chem., 36, 3853 (1993),<br></p>

<p>Applications LY 338979 is a metabolite of the antifolate Pemetrexed (P219500).<br>References Woodland, J.M. et al.: Drug Metab. Dispos., 25, 693 (1997);<br></p>

<p>Stability Hygroscopic<br>Applications Labelled Iopamidol, a nonionic radiocontrast medium. Diagnostic aid (radiopaque medium).<br>References Drayer, B., et al.: Am. J. Neuroradiol., 3, 59 (1982); Molyneux, A.J., et al.: Br. J. Radiol., 55, 117 (1982); Sovak, M., et al.: Radiology, 142, 115 (1982); Felder, E., et al.: Anal. Profiles Drug Subs., 17, 115 (1988);<br></p>

<p>Stability Hygroscopic<br>Applications A serotonin 5HT1-receptor agonist. Antimigraine.<br>References Humphrey, P.P.A., et al.: Br. J. Pharmacol., 94, 1123 (1988),<br></p>

<p>Applications Methotrexate-d3 Hexaglutamate is the isotope labelled analog of Methotrexate Hexaglutamate (M260745); a metabolite of Methotrexate (M260675) which is 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 N-Butyldeoxynojirimycin Hydrochloride-d9 is labelled N-Butyldeoxynojirimycin Hydrochloride (B691000) which is an inhibitor of a-glucosidase 1 as well as being an inhibitor of HIV cytopathicity.<br>References Hettkamp, H., et al.: Eur. J. Biochem., 142, 85 (1984), Szumilo, T., et al.: Arch. Biochem. Biophys., 247, 261 (1986), Fleet, G.W.J., et al.: FEBS Letters, 237, Number 1,2, 128 (1988), Kolter, T., et al.: Angew. Chem. Int. Ed. Engl., 36, 1955 (1997),<br></p>

<p>Stability Hygroscopic<br>Applications Labelled Paraquat Dichloride, a commonly used heribicide. Paraquat Dichloride is a fast-acting and non-selective viologen derivative that kills green plant tissue on contact. Studies suggest that there might be a possible link between Paraquat Dichloride and the development of Parkinson’s disease.<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 Heylings, J.R. et al.: Toxicology, 241, 1 (2007); Wibawa, W. et al.: Int. J. Agric. Biol., 11, 145 (2009); Franco, R. et al.: Chem.-Biol. Inter., 188, 289 (2010);<br></p>

<p>Applications Intermediate in the production of Methotrexate<br>References Chiosis, G., et al.: Bioorg. Med. Chem., 10, 3555 (2002), Palanki, M., et al.: J. Med. Chem., 50, 4279 (2007), Zav'yalov, S., et al.: Pharm. Chem. J., 42, 51 (2008),<br></p>

<p>Stability Hygroscopic<br>Applications A Serotonin 5HTID-receptor agonist.<br>References Glen, R.C., et al.: J. Med. Chem., 38, 3566 (1995), Seaber, E., et al.: Brit. J. Clin. Pharmacol., 41, 141 (1996), Tepper, S.J., et al.: Curr. Med. Res. Opin., 15, 254 (1999)<br></p>

<p>Impurity Methotrexate EP Impurity H<br>Applications Methotrexate γ-methyl ester is an impurity of Methotrexate (M260675), a folic acid antagonist. Used as a antineoplastic and antirheumatic.<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 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 Regadenoson is a selective and potent A2A adenosine receptor agonist (1). The adenosine A2A receptor is a G-protein-coupled receptor and a key therapeutic target for oncologic, inflammatory, Parkinson's and cardiovascular diseases (2). In rodent studies, it has been shown that co-administration of Regadenoson with Temozolomide (T017775) can increase Temozolomide concentration in the brain (3).<br>References (1) Gao, Z., et al.: J Pharmacol Exp Ther. 298, 209 (2001) (2) Yuan, G., et al.: Expert Opin Drug Discov. 10, 63 (2015) (3) Jackson, S., et al.: J Neurooncol. 126, 433 (2016)<br></p>