Purines and Pyrimidine Derivatives

<p>Stability Hygroscopic<br>Applications A labelled 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 Febuxostat (F229000) is the parent compound for 2,5-Ethyl Acetate Febuxostat. Used for treatment of hyperuricemia and chronic gout. 40-120 mg/day febuxostat was proven effective in lowering serum urate levels when administered to manage hyperuricemia in patients with gout.<br>References Osada, Y., et al.: Eur. J. Pharmacol., 241, 183 (1993), Okamoto, K., et al.: J. Biol. Chem., 278, 1848 (2003), Mayer, M.D., et al.: Am. J. Therap., 12, 22 (2005), Tomlinson, B., et al.: Curr. Opin. Invest. Drugs, 6, 1168 (2005),<br></p>

<p>Applications 7-Hydroxy Methotrexate Ammonium Salt is a metabolite of Methotrexate (M260675), which is used as an 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 An inhibitor of a-glucosidase 1 as well as being an inhibitor of HIV cytopathicity. N-Butyldeoxynojirimycin has recently been used to retard lipid storage in the central nervous system of an animal model of Tay-Sachs disease.1-Deoxynojirimycin derivatives as selective inhibitors of glucosylceramide metabolism in man.<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>Applications N-Acetyl Memantine is an intermediate used for preparation of Memantine (M218000).<br>References Gerzon, K., et al.: J. Med. Chem., 6, 760 (1963), Reddy, J., et al.: Org. Process Res. Dev., 11, 268 (2007),<br></p>

<p>Applications Ethyl 2-(4-Hydroxyphenyl)-4-methylthiazole-5-carboxylate is used in the synthesis of the major metabolites of Febuxostat (F229000), a xanthine oxidase/xanthine dehydrogenase inhibitor. Used for treatment of hyperuricemia and chronic gout. 40-120 mg/day febuxostat was proven effective in lowering serum urate levels when administered to manage hyperuricemia in patients with gout.<br>References Li, X., et. al.: Lett. Org. Chem., 12, 217 (2015); Vallu, V., et. al.: Anal. Chem. Indian J., 14, 339 (2014); Osada, Y., et al.: Eur. J. Pharmacol., 241, 183 (1993); Okamoto, K., et al.: J. Biol. Chem., 278, 1848 (2003); Mayer, M.D., et al.: Am. J. Therap., 12, 22 (2005); Tomlinson, B., et al.: Curr. Opin. Invest. Drugs, 6, 1168 (2005)<br></p>

<p>Applications A metabolite of Purine in cocaine addiction.<br>References Jansen, R., et al.: Clin. Biochem., 38, 362 (2005), Vorst, O., et al.: Metabolomics, 1, 169 (2005), Want, E., et al.: ChemBioChem., 6, 1941 (2005), van der Werf, M., et al.: Anal. Biochem., 370, 17 (2007),<br></p>

<p>Impurity Ondansetron EP Impurity D; Ondansetron USP Related Compound D<br>Applications 1,2,3,9-Tetrahydro-9-methyl-3-methylene-4H-carbazol-4-one (Ondansetron EP Impurity D; Ondansetron USP Related Compound D) is an impurity of Ondansetron (O655000).<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 Feng, R. et al.: Zhong. Yaox. Zaz., 46, 1436 (2011); Zizkovsky, V. et al.: J. Pharm. Biomed. Anal., 44, 1048 (2007)<br></p>

<p>Applications (R)-9-[2-(Hydroxypropyl] Adenine (Desphosphoryl Tenofovir) (cas# 14047-28-0) is a useful reagent for preparing the antiviral drug tenofovir.<br>References Dietz, J.-P., et al.: ChemRxiv, 1 (2020)<br></p>

<p>Applications Picornavirus replication inhibitor. Antiviral.<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 Kearns, G.L., J. Clin. Pharmacol., 39, 613 (1999), Schmidtke, M. et al.: Antiviral Res. 81, 56 (2009)<br></p>

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

<p>Applications A xanthine derivative with bronchodilator activity. Typically combined as salt component with other medications such as Ambroxol to treat bronchial and pulmonary diseases.<br>References Kim, S., et al.: J. Med. Chem., 45, 2131 (2002), Bruno-Blanch, L., et al.: Bioorg. Med. Chem. Lett., 13, 2749 (2003), Foppoli, A., et al.: J. Pharm. Sci., 96, 1139(2007),<br></p>

<p>Stability Store tightly sealed at RT<br>Applications Paraxanthine is an adenosine receptor ligand and a major metabolite of caffeine.This compound is a contaminant of emerging concern (CECs).<br>References Proc. Natl. Acad. Sci. USA 78, 3260 (1981); Cell Mol. Neurobiol., 3, 69 (1983); Eur. J. Pharmacol., 179, 295 (1990)<br></p>

<p>Stability Very Hygroscopic and Temperature Sensitive<br>Applications Tenofovir Disoproxil impurity.<br>References Cheng, G., et al.: Chem. Res. Toxicol., 16, 145 (2003),<br></p>

<p>Applications 3,5-Dinitropyridine is used as an azabenzyne pyrolytic precursor. The anion radical of 3,5-dinitropyridine aundergoes reversible dimerization reactions.<br>References Winkler, M., et al.: J. Am. Chem. Soc., 126, 6135 (2004); Macias-Ruvalcaba, N., et al.: J. Electroanal. Chem., 600, 294 (2007)<br></p>

<p>Impurity Allopurinol EP Impurity C / Allopurinol USP Related Compound C<br>Applications 3-(4H-1,2,4-Triazol-4-yl)-1H-pyrazole-4-carboxamide (Allopurinol EP Impurity C) is an impurity of Allopurinol (A547300).<br></p>

<p>Impurity Pemetrexed EP Impurity A<br>Applications N-Methyl Pemetrexed (Pemetrexed EP Impurity A) is an impurity of Pemetrexed (P219500), an multitargeted antifolate that inhibits thymidylate synthase as well as other folate dependent enzymes.<br>References Kjell, D.P., et al.: Org. Proc. Res. Develop., 9, 738 (2005);<br></p>

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

<p>Applications N6-(2-Isopentenyl)adenine can be used in biological study for cytokinins stimulated expression of stress-related proteins and transcripts in Arabidopsis thaliana with isopentenyltransferase overexpression.<br>References Skalak, J., et al.: J. Exp. Bot., 67, 2861-2873 (2016)<br></p>

<p>Applications A fluorescent analog of Nicotinamide Adenine Dinucleotide as a coenzyme for glutamate dehydrogenase.<br>References Gafni, A., et al.: Biochemistry, 20, 6041 (1981), Creedon, K., et al.: J. Biol. Chem., 269, 16364 (1994), Seley, K., et al.: Bioorg. Med. Chem., 6, 797 (1998),<br></p>

<p>Applications Lablled Caffeine (C080100). Caffeine is 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.<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 A metabolite of Zolmitriptan (Z639000).<br>References Buckingham, J., et al.: J. Med. Chem., 38, 3566 (1995),<br></p>

<p>Applications Nucleoside analog; specific inhibitor of hepatitis B virus (HBV) replication. Antiviral.<br>References Standring, D.N., et al.: Antiviral. Chem. Chemother., 12, 119 (2001), Hernandez-Santiago, B., et al.: Antimicrob. Agents Chemother., 46, 1728 (2002), Lai, C.-L., et al.: Hepatology, 40, 719 (2004), Han, S.-H.B., et al.: Expert Opin. Invest. Drugs, 14, 511 (2005),<br></p>

<p>Stability Hygroscoipic<br>Applications 4,6-Dihydroxypyrazolo[3,4-d]pyrimidine is a major metabolite of Allopurinol (A547300). It is a xanthine oxidase inhibitor.<br>References Pacher, P., et al.: Pharmacol. Rev., 58, 87 (2006); Marro, P., et al.: Brain Res., 650, 9 (1994); Abramov, A., et al.: J. Neurosci., 27, 1129 (2007); Day, R., et al.: Clin. Pharmacokinet., 46, 623 (2007);<br></p>

<p>Applications Labelled Nicotinic acid. It is a precursor of the coenzymes NAD and NADP. Widely distributed in nature; appreciable amounts are found in liver , fish, yeast and cereal grains. Dietary deficiency is associated with pellagra. The term “niacin” has also been applied to nicotinamide or to other derivatives exhibiting the biological activity of nicotinic acid. Vitamin (enzyme cofactor).A representative lot contains &gt;20% d4.<br>References Darby, W.J., et al.: Nutr. Rev., 33, 289 (1975), Black, A., et al.: Eur. J. Clin. Nutr., 54, 395 (2000), Cole, T., et al.: Br. Med. J., 320, 1240 (2000), Forshee, R., et al.: J. Nutr., 134, 2733 (2004),<br></p>

<p>Applications Xanthine derivative with diuretic, cardiac stimulant and smooth muscle relaxant activities; isomeric with theobromine. Small amounts occur in tea. Bronchodilator.<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 Cohen, J.L., et al.: Anal. Profiles Drug Subs., 4, 466 (1975), Svedmyr, K., et al.: Allergy, 37, 111 (1982),<br></p>

<p>Applications Ethyl 2-(3-Cyano-4-isobutoxyphenyl)-4-methyl-5-thiazolecarboxylate is an impurity of Febuxostat (F229000), a xanthine oxidase/xanthine dehydrogenase inhibitor. Used for treatment of hyperuricemia and chronic gout. 40-120 mg/day febuxostat was proven effective in lowering serum urate levels when administered to manage hyperuricemia in patients with gout.<br>References Vallu, V., et. al.: Anal. Chem. Indian J., 14, 339 (2014); Osada, Y., et al.: Eur. J. Pharmacol., 241, 183 (1993); Okamoto, K., et al.: J. Biol. Chem., 278, 1848 (2003); Mayer, M.D., et al.: Am. J. Therap., 12, 22 (2005); Tomlinson, B., et al.: Curr. Opin. Invest. Drugs, 6, 1168 (2005)<br></p>

<p>Applications Labelled 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>Impurity Allopurinol EP Impurity B / Allopurinol USP Related Compound B<br>Stability Hygroscopic<br>Applications 3-(Formylamino)-1H-pyrazole-4-carboxamide (Allopurinol EP Impurity B) is an impurity of Allopurinol (A547300) with inhibitory effects on human hypoxanthine phosphoribosyltransferase.<br>References Krenitzky, T.A. et al.: J. Biol. Chem., 244, 1263 (1969);<br></p>

<p>Applications 1,2,3,9-Tetrahydro-3-(1H-imidazol-1-ylmethyl)-9-methyl-4H-carbazol-4-one is an metabolite of Ondansetron (O655000), is a selective 5-hydroxytryptamine3 (5-HT3) receptor antagonist that has been introduced to clinical practice as an antiemetic for cancer treatment-induced and anesthesia-related nausea and vomiting.<br>References Kris, M.G., et al.: J. Clin. Oncol., 6, 659 (1988), Faris, P..L., et al.: Lances, 355, 792 (2000), Ye, J.H., et al.: CNS Drug Reviews., 7, 199 (2001);<br></p>

<p>Applications S(+)-N-(2-(2-Thienyl)ethyl)-2-chlorophenyl Glycine Methyl Ester Hydrochloride is an impurity from Clopidogrel (C587250) which acts as an anti-platelet agent.<br>References Zhu, Y. et al.: ACS. Med. Chem. Lett., 4, 349 (2013); Feuerstein, G., et al.: Exp. Opin. Invest. Drugs, 4, 425 (1995)<br></p>

<p>Applications Impurity of Allopurinol (A547300), an xanthine oxidase inhibitor used in treatment of hyperuricemia and chronic gout. Antiurolithic.<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 1-Bromo-3,5-dimethyladamantane (cas# 941-37-7) is a compound useful in organic synthesis.<br></p>

<p>Applications Orotic Acid-15N2 Monohydrate is a labelled analogue of Orotic Acid Monohydrate (O691500(P)), which is used in the preparation of therapeutic agents for chronic obstructive pulmonary disease (COPD) treatment.<br>References Furukawa, S.: PCT Int. Appl. (2009), WO 2009069291 A1<br></p>

<p>Impurity Methotrexate EP Impurity I<br>Applications Methotrexate α-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 Labelled 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 A metabolite of Caffeine.<br>References Kalow, W., et al.: Clin. Pharmacol. Ther., 53, 503 (1993), Sharma, S., et al.: Cancer Res., 54, 5848 (1994), Sugawara, M., et al.: J. Biol. Chem., 275, 16473 (2000), Takeda, M., et al.: J. Pharmacol. Exp. Ther., 302, 666 (2002),<br></p>

<p>Applications Labelled Febuxostat (F229000). Xanthine oxidase/xanthine dehydrogenase inhibitor. Used for treatment of hyperuricemia and chronic gout.<br>References Osada, Y., et al.: Eur. J. Pharmacol., 241, 183 (1993), Okamoto, K., et al.: J. Biol. Chem., 278, 1848 (2003), Mayer, M.D., et al.: Am. J. Therap., 12, 22 (2005), Tomlinson, B., et al.: Curr. Opin. Invest. Drugs, 6, 1168 (2005),<br></p>

<p>Applications Intermediate in the production of Thyroxine<br></p>

<p>Applications 8-Descarboxamido-8-cyano Temozolomide is a useful synthetic intermediate in the synthesis 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>Applications A metabolite of Theophylline.<br>References Chen, Y., et al.: Clin. Exper. Pharmacol. Physiol., 36, 828 (2009), Yu, C., et al.: J. Bacteriol., 191, 4624 (2009), Jetter, A., et al.: Eur. J. Clin. Pharmacol., 65, 411 (2009),<br></p>

<p>Applications 2-Fluoroadenosine is a fluorinated analog of Adenoside (A280400) nucleotide.<br>References Long, X., et al.: J. Pharmacol. Exper. Ther., 335, 781 (2010); Ham, M., et al.: J. Pharmacol. Exper. Ther., 335, 607 (2010);<br></p>

<p>Stability Hygroscopic<br>Applications Tenofovir Monohydrate is an HIV-1 RT inhibitor and antiretroviral drug.<br>References Zhao, Z., et al.: Method for preparing medical salts and/or derivatives of tenofovir disoproxil, and their application for preventing and/or treating HBV and HIV/AIDS infections, CN 101574356 (2009);<br></p>

<p>Applications Paraxanthine-d3, is the labeled analogue of Paraxanthine (P192500), an adenosine receptor ligand and a major metabolite of caffeine.<br>References Proc. Natl. Acad. Sci. USA 78, 3260 (1981); Cell Mol. Neurobiol., 3, 69 (1983); Eur. J. Pharmacol., 179, 295 (1990)<br></p>

<p>Impurity Memantine Related Compound A (1,3-Dimethyladamantane)<br>Applications 1,3-Dimethyladamantane is a dimethylated adamantane derivative. Memantine impurity A. Memantine Related Compound A (1,3-Dimethyladamantane).<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 Ethyl 2-Chloracetoacetate is used in the preparation of oxazoles and thiazoles as agonists for peroxisome proliferator-activated receptor δ. It is also used to synthesize dimethylimidazothiadiazolecarbohydrazides with anticancer activities.<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 Sznaidman, M., et al.: Bioorg. Med. chem. Lett., 13, 1517 (2003); Terzioglu, N., et al.: Eur. J. Med. Chem., 38, 781 (2003)<br></p>

<p>Applications A metabolite of Ondansetron (O655000).<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 Bayliss, M., et al: Xenobiotica, 24, 231 (1994), Atkins, W., et al.: J. Biol. Chem., 277, 33258 (2002), De Graaf, I., et al.: Drug Metab. Dispos., 30, 1129 (2002),<br></p>

<p>Applications 3-Descyano Febuxostat is an impurity of Febuxostat (F229000), a xanthine oxidase/xanthine dehydrogenase inhibitor. Used for treatment of hyperuricemia and chronic gout. 40-120 mg/day febuxostat was proven effective in lowering serum urate levels when administered to manage hyperuricemia in patients with gout.<br>References Kadivar, M.H., et. al.: J. Pharmaceut. Biomed. Anal., 56, 749 (2011); Vallu, V., et. al.: Anal. Chem. Indian J., 14, 339 (2014); Osada, Y., et al.: Eur. J. Pharmacol., 241, 183 (1993); Okamoto, K., et al.: J. Biol. Chem., 278, 1848 (2003); Mayer, M.D., et al.: Am. J. Therap., 12, 22 (2005); Tomlinson, B., et al.: Curr. Opin. Invest. Drugs, 6, 1168 (2005)<br></p>

<p>Stability Moisture Sensitive<br>Applications Used in conjunction with Isothiocyanate to conduct partial Edman Degradation on biologically active peptides.<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 Heidenreich, O., et al.: J. Biol. Chem., 269, 2131 (1994), Kothe, U., et al.: Anal. Biochem., 356, 148 (2006), Thakkar, A., et al.: Anal. Chem., 78, 5935 (2006),<br></p>

<p>Applications Methotrexate α-tert-Butyl Ester is an intermediate to the synthesis of folic acid antagonist Methotrexate (M260675) used in the study of membrane-associated folate transporters from L1210 cells.<br>References Yoshii, T., et al.: J. Am. Chem. Soc., 136, 16635 (2014);<br></p>

<p>Applications A selective A1-adenosine receptor agonist. Induces apoptosis.<br>References Evans, et al.: Neurosci. Lett., 83, 287 (1987), Szondy, Z.: Biochem. J., 304, 877 (1994)<br></p>

<p>Stability Very Hygroscopic<br>Applications A metabolite of Tenofovir (T018500).<br>References Hazra, R., et al.: Antimicrob. Agents Chemother., 48, 124 (2004), Piketty, C., et al.: Antivir. Ther., 11, 213 (2006), Molto, J., et al.: Ther. Drug Monit., 29, 648 (2007),<br></p>

<p>Applications A useful synthetic intermedate. A naturally occuring, biologically active isomer of guanosine. Reported to stimulate the accumulation of cyclic-AMP in the brain. It is an inhibitor of IMP pyrophosphorylase, and its 5’-di and -tri-phosphates inhibit glutamic acid dehydrogenase. May contain approximately 0.6 moles of water.<br>References Divakar, K.J., et al.: J. Chem. Soc. Perkin Trans., 1, 771 (1991), Montsch, H.H., et al: Biochemistry, 14, 5593 (1975), Hagen, C.: Biochim. Biophys. Acta., 293, 105 (1973), Huang, M., et al.: J. Med. Chem., 15, 462 (1972)<br></p>

<p>Applications A reagent used in the preparation of hepatitis C virus NS3 protease inhibitors and PMPA prodrugs with antiretroviral activity.<br>References Sheng, X. et al.: Bioorg, Med. Chem. Lett., 169, 3453 (2009); Arimilli, M.N. et al.: Antiviral Chem. Chemother., 8, 557 (1997);<br></p>

<p>Applications 3-Chlorodiphenylamine (cas# 101-17-7) is a compound useful in organic synthesis.<br></p>

<p>Applications Herbicide safener.<br>References Lee, H., et al.: Eur. J. Med. Chem., 40, 862 (2005), Wright, S., et al.: Bioorg. Med. Chem. Lett., 17, 5638 (2007), Brazier-Hicks, M., et al.: J. Biol. Chem., 283, 21102 (2008), Vinggaard, A., et al.: Chem. Res. Toxicol., 21, 813 (2008),<br></p>

<p>Applications Metabolite of Caffeine (C080100).<br>References Grant, D.M., et al.: Clin. Pharm. and Ther., 33, 591 (1983),<br></p>

<p>Stability Hygroscopic<br>Applications A metabolite of Memantine (M218000), used for the treatment of neurological disorders.<br>References Eiichi, K., et al.: Chem. Pharm. Bull., 33, 4680 (1985),<br></p>

<p>Stability Volatile<br>Applications Acetal is a flavouring component of Baiju and Rum. It is also a useful reactant in organic synthesis.<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 Franitza, Laura, et al.: J. of Agric. and Food Chem., 64(47), 9041-9053 (2016);<br></p>

<p>Applications 3-Oxobutanoic Acid Methyl Ester is a chemical reagent used in the synthesis of pharmaceuticals. It participates in the Biginelli reaction, forming molecules including dihydropyrimidinones.<br>References Ranu, B. et al.: J. Org. Chem. 65, 6270 (2000); Lu, J. et al.: Tetrahedron Lett., 41, 9075 (2000); Lu, J. et al.: Synlett., 1, 63 (2000);<br></p>

<p>Stability Hygroscopic<br>Applications A metabolite of DAMPA.<br>References Bleyer, W., et al.: Cancer, 41, 36 ( 1978), Abelson, H., et al.: J. Clin. Oncol., 1, 208 (1983), Fabre, G., et al.: Biochem. Pharmacol., 35, 1325 (1986), Widemann, B., et al.: Clin. Chem., 45, 223 (1999),<br></p>