Others

Impurity Entacapone EP Impurity A
Applications cis-Entacapone (Entacapone EP Impurity A) is the (Z)-Isomer of Entacapone polymorphic form B. Antiparkinsonian.
References Karlsson, M., et al.: J. Pharm. Biomed. Anal., 10, 593 (1992), Nissinen, E., et al.: Arch. Pharmacol., 346, 262 (1992), Wikberg, T., et al.: Eur. J. Drug Metab. Pharmacokinet., 18, 359 (1993),

Applications The main metabolite of Entacapone and Tolcapone.
References Mannisto, P., et al.: Prog. Drug Res., 39, 291(1992), Nishi, H., et al.: J. Pharm. Biomed. Anal., 11, 1277 (1993), Wikberg, T., et al.: Eur. J. Drug Metab. Pharmacokinet., 18, 359 (1993),

Stability Hygroscopic
Applications An impurity of the antiparkinsonian and antispasmodic agent Memantine (M218000).
References Rystov, L. et al.: J. Pharmac. Biomed. Anal., 56, 887 (2011);

Stability Hygroscopic
Applications 7-Methyl Memantine is an impurity of Memantine (HCl salt, M218000) which is used as an antiparkinsonian and antispasmodic.
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)

Applications Cyclopropanecarboxylic Acid is used as a reagent in the synthesis of substituted 4-(thiophen-2-ylmethyl)-2H-phthalazin-1-ones as potent PARP-1 inhibitors. Also used as a reagent in the synthesis of 2-alkyloxazoles as potent and selective PI4KIIIβ inhibitors demonstrating inhibition of HCV replication.
Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package
References Wang, L., et al.: Bioorg. Med. Chem. Lett., 24, 3739 (2014); Keaney, E.P., et al.: Bioorg. Med. Chem. Lett., 24, 3714 (2014)

Stability Light Sensitive, Temperature Sensitive
Applications It is one of the two carotenoids contained within the retina.
References Karrer, et al.: Helv. Chim. Acta, 13, 268 (1930), Hlubucek, et al.: J. Chem. Soc. Perkin Trans., 1, 848 (1974), Maoka, T., et al.: Comp. Biochem. Physiol., 83B, 121 (1986),

Applications An impurity of labelled Salicylic Acid synthesis
References Kovacik, J., et al.: J. Agric. Food Chem., 57, 9848 (2009), Gao, X., et al.: Anal. Biochem., 393, 163 (2009), Rocher, F., et al.: Plant Physiol., 150, 2081 (2009),

Applications 5-9-Leuprolide is a metabolite of Leuprolide (L330590), a gonadotropin-releasing hormone (GnRH) analogue acting as an agonist at pituitary GnRH receptors.
References Handelsman, David J., et al.: J. of Steroid Biochem. and Mol. Bio., 141, 113-120 (2014);Okada, Hiroaki, et al.: Pharma. Res., 8(6), 787-91 (1991)

Applications Antitumor agent. A potent inhibitor of dihydropyrimidine dehydrogenase (DPD).
References Shirasaka, T., et al.: Cancer Res., 56, 2602 (1996), Patt, Y., et al.: J. Clin. Oncol., 22, 271 (2004), Shirao, K., et al.: Cancer, 100, 2355 (2004), Kelly, H., et al.: J. Clin. Oncol., 23, 4553 (2005),

Impurity Atenolol EP Impurity E
Applications 4,4'-[(2-Hydroxy-1,3-propanediyl)bis(oxy)]bis-benzeneacetamide is an impurity of Atenolol (A790075), a cardioselective β-adrenergic blocker. Atenolol EP Impurity E
References Caplar, V., et al.: Anal. Profiles Drug Subs., 13, 1 (1984);

Applications Dehydro Silodosin is an impurity of Silodosin (S465000).
References Moriyama., et al.: Eur. J. Pharmacol., 331, 39 (1997), Zhu, J., et al.: Br. J. Pharmacol., 131, 546 (2000),

Applications N-Nitrosoatenolol is an N-nitroso derivative of Atenolol (A790075), which is a cardioselective β-adrenergic blocker. Antihypertensive, antianginal, antiarrhythmic (class II). N-Nitrosoatenolol can be used for its genotoxic effect in rat and human hepatocytes.
References Caplar, V., et al.: Anal. Profiles Drug Subs., 13, 1 (1984); Robbiano, L., et.al., Cancer Res., 51, 2273-2279, (1991);

Impurity Atenolol EP Impurity C
Applications 4-(2,3-Epoxypropoxy)phenylacetamide (Atenolol EP Impurity C) is an impurity of Atenolol, a cardioselective β-adrenergic blocker.
References Caplar, V., et al.: Anal. Profiles Drug Subs., 13, 1 (1984)

Impurity Memantine USP Related Compound B (3,5-Dimethyladamantane-1-ol)
Applications 3,5-Dimethyl-1-adamantanol is an impurity of Memantine (M218000). Memantine impurity B. Memantine USP Related Compound B (3,5-Dimethyladamantane-1-ol).
References England, P., et al.: Biochemistry, 43, 11623 (2004), Schousboe, A., et al.: Eur. J. Pharmacol., 500, 281 (2004), Horvat, S., et al.: J. Med. Chem., 49, 3136 (2006),

Applications Gentisuric Acid is a metabolite that was found in hen plasma, tissues, and eggs as a result of the consumption of naturally occurring salicylates.
References Protasiuk, E., & Olejnik, M.: Food Addit. Contam. Part A, 37, 946 (2020)

Applications Labelled Diazepam, an anxiolytic; muscle relaxant (skeletal); anticonvulsant.Diazepam is a Controlled substance (depressant).
Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package
References MacDonald, A., et al.: Anal. Profiles Drug Subs., 1, 79 (1972); Mandelli, M., et al.: Clin. Pharmacokinet., 3, 72 (1978); Bertilsson, L., et al.: Pharmacol. Ther., 45, 85 (1990); Murray, J.B., et al.: J. Psychol., 124, 655 (1990); Pellock, J.M., et al.: Drug Saf., 27, 383 (2004);