Aminoacids and derivatives

<p>Applications Lacosamide impurity I: (R)-N-benzyl-2-(3-benzylureido)-3-methoxypropanamide is an impurity of lacosamide (L098500), a medication used for the adjunctive treatment of partial-onset seizures and diabetic neuropathic pain. Lacosamide is a potent anticonvulsant.<br>References Lees, G., et al.: Brain Res., 612, 190 (1993), Kuo, C., et al.: Mol. Pharmacol., 51, 1077 (1997), Barton, M., et al.: Epilepsy Res., 47, 217 (2001), Beyreuther, B., et al.: Eur. J. Pharmacol., 539, 64 (2006), Beyreuther, B., et al.: CNS Drug Rev., 13, 21 (2007),<br></p>

<p>Stability Hygroscopic<br>Applications Carbocisteine Lactam is an impurity of the mucolytic agent Carbocisteine (C178760).<br>References Anonymous., et al.: Biochem. J., 219, 345 (1984); Sanger, F., et al.: Biochem. J., 59, 509 (1955); Hekman, C., et al.: J. Pharm. Biomed. Anal., 20, 763 (1999);<br></p>

<p>Applications (R)-Baclofen is the R-Enantiomer of Baclofen, a specific GABA-B receptor agonist and a muscle relaxant (1,2).<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 (1) Brogden, R.N., et al.: Drugs, 8,1 (1974) (2) Song, Y., et al.: Endocrinology. en.2016-1776 (2017)<br></p>

<p>Impurity Tranexamic EP Impurity C<br>Stability Hygroscopic<br>Applications 4-(Aminomethyl)-1-cyclohexene-1-carboxylic Acid (Tranexamic EP Impurity C) is an impurity of Tranexamic acid (T714505).<br></p>

<p>Applications L-Lysine is an essential amino acid for human development. Lysine residues are useful in many cellular processes, due to their ability to accept a wide variety of post-translational modifications.<br>References Tosha, L. et. al.: Biochem. J. 435, 509 (2011);<br></p>

<p>Applications L-Kynurenine-d4 Trifluoroacetic Acid Salt is the isotope labelled analog of L-Kynurenine. L-Kynurenine is a tryptophan metabolite which is a precursor of kynurenic acid, an antagonist of N-methyl-aspartate receptor.<br>References Swartz, K., et al.: J. Neurosci., 10, 2965 (1990);, Hasegawa, H., et al.: Anal. Bioanal. Chem., 377, 886 (2003); Tsai, Y., et al.: Anal. Biochem., 319, 34 (2003); Mitsuhashi, S., et al.: Anal. Chim. Acta, 584, 315 (2007)<br></p>

<p>Applications 2,5-Piperazinedione, can be used as an intermediate in the preparation of various pharmaceutical and biologically active compounds. It can be used in the synthesis of dipeptide isosteres by cross-metathesis.<br>References Enholm, J.E. et al.: Tetrahedron, 68, 6920 (2012);<br></p>

<p>Stability Hygroscopic<br>Applications R-(+)-Carbidopa is an inhibitor of DOPA decarboxylase, which plays a significant role in the prevention of the conversion of L-DOPA (D533751) to dopamine (D533780). Studies has also indicated the inhibitory effects of towards L-DOPA in human liver prepns and as well as 5-hydroxytryptophan (H975700).<br>References Vogel, W.H. et al.: Arch. Int. Pharmacodyn. Ther. 198, 85 (1972);<br></p>

<p>Stability Hygroscopic<br>Applications Indole-3-carboxaldehyde- 13C8 is the labelled Indole-3-carboxaldehyde (I615020) which is a tryptophan (T947200) metabolite from Streptomyces staurosporeus and it is chemical constituent from Inula wissmanniana. Indole-3-carboxaldehyde and other tryptophan metabolites play an important role in mammalian gut immune homeostasis.<br>References Yang, S., et al.: J. Nat. Prod., 60, 44 (1997); Cheng, X. et al.: Chem. Nat. Compd., 49, 815 (2013); Zelante, T., et al,: Immunity, 39, 372 (2013)<br></p>

<p>Applications A labelled imidazole, a versatile heterocycle used in the preparation of various biologically active compounds such as the amino acid histidine and is present in many antifungal medication. It is also used extensively as a corrosion inhibitor on transition metals such as copper.<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 Arispe, N. et al.: Biophys. J., 95, 4879 (2008); Troesken, E.R. et al.: Endo. Res., 30, 387 (2004); Otmacic Curkovic, H. et al.: Corr. Sci., 51, 2342 (2009);<br></p>

<p>Applications A metabolite of Tryptophan. 5-Hydroxytryptophan (5-HTP) is a direct 5-hydroxytryptamine (5-HT) precursor used to assess central serotonergic function.<br>References Gartside, S., et al.: Eur. J. Pharmacol., 179, 103 (1990), Gijsman, H., et al.: J. Clin. Psychopharmacol., 22, 183 (2002), Schruers, K., et al.: Psychiatry Res., 113, 237 (2002),<br></p>