Beta Blockers

Impurity Atenolol EP Impurity H
Applications 2-[4-[(2RS)-2-Hydroxy-3-[(1-methylethyl)amino]propoxy]phenyl]acetonitrile is an impurity of Atenolol (A790075), a cardioselective β-adrenergic blocker. Atenolol EP Impurity H
References Caplar, V., et al.: Anal. Profiles Drug Subs., 13, 1 (1984);

Applications A new known impurity of Carvedilol (C184625), published in Carvedilol USP monograph.

Applications (S)-4-Hydroxy Propranolol is the main metabolite of (S)-Propranolol (P831795).
References Shwed, J., et al.: Xenobiotica, 22, 973 (1992), Fujita, K., et al.: Biol. Pharm. Bull., 22, 446 (1999), Walle, U., et al.: Drug Metab. Dispos., 30, 564 (2002),

Applications A metabolite of Propranolol.
References Otton, S., et al.: Br. J. Clin. Pharmacol., 30, 751 (1990), Fujita, S., et al.: J. Pharmacol. Exp. Ther., 264, 226 (1993), Bichara, N., et al.: Drug Metab. Dispos., 24, 112 (1996), Tasaki, T., et al.: J. Biochem., 123, 162 (1998),

Applications A metabolite of Propranolol.
References Otton, S., et al.: Br. J. Clin. Pharmacol., 30, 751 (1990), Fujita, S., et al.: J. Pharmacol. Exp. Ther., 264, 226 (1993), Bichara, N., et al.: Drug Metab. Dispos., 24, 112 (1996), Tasaki, T., et al.: J. Biochem., 123, 162 (1998),

Applications Lodoxamide-15N2,d2 is the labelled form of Lodoxamide which is an antiallergic drug that acts as a mast cell stabilizer. It is effective in the treatment of allergic conjunctivitis and in decreasing vascular permeability.
References Ciprandi, G., et al.: Allergy, 51(12), 946-951 (1996); Bayer, Atilla., et al.: Ophthalmologica, 217(2), 119-123 (2003)

Applications 2-(2-Methoxyethyl)phenol is used as a stabilizer in the preparation of polysiloxane based coating compounds with good stability.

Applications 4-Methyl-1-hydrazinophthalazine is used in the synthesis of novel phthalazine derivatives as antihypertensive agents.

Applications A metabolite of Eplerenone. Used in combination therapy for treatment of cardiovascular disorders.
References Staessen, J., et al.: J. Endocrinol., 91, 457 (1981), de Gasparo, M., et al.: J. Pharmacol. Exp. Ther., 240, 650 (1987), MacFadyen, R., et al.: Cardiovasc. Res., 35, 30 (1997),

Applications Labelled Penbutolol (P220500). A β-adrenoceptor antagonist. Antihypertensive.
References Armstrong, D., et al.: Anal. Chem., 66, 1473 (1994), Kato, M., et al.: J. Pharm. Biomed. Anal., 30, 1845 (2003),

Impurity Atorvastatin 2-Hydroxy Lactone
Stability Hygroscopic
Applications A metabolite of Atorvastatin, a selective, competitive HMG-CoA reductase inhibitor. Atorvastatin is the only drug in its class specfically indicated for lowering both elevated LDL-cholesterol and triglycerides in patients with hypercholesterolemia.

Applications A metabolite of Carvedilol (C184625). It is used in the treatment of hypertension.
References Sponer, G., et al.: J. Cardiovasc. Pharmacol., 9, 317 (1987), Fujimaki, M., ET AL.: Xenobiotica, 20, 1025 (1990), Ruffolo, R., et al.: Eur. J. Clin. Pharmacol., 38, S82 (1990), Schaefer, W.H., et al.: Drug Metab. Dispos., 26, 10, 958 (1998),

Applications Pindolol (P468000) impurity.

Stability Hygroscopic
Applications Atorvastatin impurity in bulk drug and tablets.
References Posvar, E., et al.: J. Clin. Pharmacol., 36, 728 (1996), Lea, A., et al.: Drugs, 53, 828 (1997), Miao, X., et al.: J. Chromatogr., 998, 133 (2003),

Impurity Rosuvastatin Formyl Impurity
Applications Rosuvastatin intermediate.
References Watanabe, M., et al.: Bioorg. Med. Chem., 5, 437 (1997),

Applications (S)-(-)-Hydroxy Timolol is a metabolite of the non-selective beta-adrenergic receptor blocker, Timolol (T443710).
References Volotinen, M. et al.: Basic Clin. Pharmacol. Toxicol., 106, 302 (2010);

Applications The labelled R-enantiomer of Propranolol (P831800). β−Adrenergic blocker. Antihypertensive; antianginal; antiarrhythmic (class II).
References Bond, et al.: Nature, 213, 721 (1967), Hansteen, V., et al.: Br. Med. J., 284, 155 (1982), Diamond, S., et al.: J. Clin. Pharmacol., 28, 193 (1988),