Standard farmaceutici

Applications Forsythoside A is used as an antiinflammatory agent in traditional Chinese medicine.
References Li, H. et al.: Phytother. Res., 25, 338 (2011);

Applications 6α-Methyl-9α-fluoro-11β,17α-dihydroxyprogesterone is an impurity of Fluorometholone (F593145), a glucocorticoid; anti-inflammatory.
References Kupferman, A., et al.: Arch. Ophthlmol., 640, 100 (1982), Tokunaga H., et al.: Chem. Pharm. Bull., 32, 4012 (1984),

Applications Potassium bromide is an ionic compound that is commonly used in chemistry to form a pellet that can be used to analyze a number of compounds by means of infrared spectroscopy. Potassium bromide is also used as an anticonvulsant to treat refractory seizures in humans and dogs.
References Kirkland, J.: Anal. Chem., 27, 1537 (1955); Korinthenberg, R., et al.: J. Child Neuro., 22, 414 (2007); Wilberley, S., et al.: Anal. Chem., 29, 210 (1957); Yohn, S., et al.: J. Am. Vet. Med. Ass., 201, 468 (1992)

Impurity Atorvastatin Pyrrolidone Analog (USP)
Stability Light Sensitive
Applications A photodegradation product of Atorvastatin (a cyclic impurity of Atorvastatin). Atorvastatin Pyrrolidone Analog (USP).
References Roger, D., et al.: Clin. Exp. Dermatol., 19, 88 (1994), Cosa, G., et al.: Photochem. Photobiol., 80, 159 (2004), Kerwin, B., et al.: J. Pharm. Sci., 96, 1468 (2007),

Applications Protected Atorvastatin.

Applications Rosuvastatin Methyl Ester is an impurity of Rosuvastatin (R700500) in the pharmaceutical dosage forms under forced degradation conditions.
References Lennernas, H., et al.: Clin. Pharmacokinet., 32, 403 (1997), Kivisto, K., et al.: Br. J. Clin. Pharmacol., 46, 49 (1998), Lan, K., et al.: J. Pharm. Biomed. Anal., 44, 540 (2007),

Applications Anticholinergic. Antispasmodic.
References Fujita, et al.: J. Labelled Compd., 9, 149 (1972), Tanaka, et al.: J. Pharm. Soc. Jpn., 92, 510 (1972), Kawamoto H., et al.: Arzneim.-Forsch., 35, 1475 (1985),

Applications A labelled protein kinase C inhibitor.
References Marki, H.P., et al.: Helv. Chimica Acta, 71, 320 (1988), Iwagami, H., et al.: Bull. chem. Soc. Jpn., 63, 3073 (1990), Funahashi, T., et al.: J. Bacteriol., 184, 936 (2002),

Applications Dicobalt Edetate is used as a cyanide antidote.
References Hall, A.H., et. al.: Crit. Rev. Toxicol., 39, 541 (2009); Higgins, M.A., Evans, R.: Hum. Exp. Toxicol., 19, 485 (2000); Krovzov, J., et. al.: P. W. Pharmacol. Soc., 37, 43 (1994)

Impurity Irinotecan USP Related Compound E
Applications An anticancer drug, showed strong activity against various murine tumors. A Camptothecin (CPT) derivative as antineoplastic agent against drug-resistant tumors. Irinotecan USP Related Compound E.
References Brangi, M., et al.: Cancer Res., 59 5938 (1999), Miyake, K., et al.: Cancer Res., 59, 8 (1999) , Bom, D., et al.: J. Med. Chem., 43, 3970 (2000) , Gamcsik, M., et al.: Mol. Cancer Ther., 1, 11 (2001).

Stability Hygroscopic
Applications A metabolite of Azelastine (A808250).
References Heinemann, U. et al.: J. Chrom. B Anal. Tech. Biomed. Life Sci., 793, 389 (2003); Tasaka, K., et al.: Arzneim.-Forsch., 29, 488 (1979);

Applications A metabolite of methylmalonic acid and propionic acid in children with methylmalonic acid and propionic acid metabolic disorders.
References Duran, M., et al.: Clin. Chimica Acta, 82, 93 (1978), Thompson, G.N., et al.: Pediatric Res., 27, 413 (1990),

Stability Light Sensitive
Applications 6α-Chloro Testosterone is a derivative of Testosterone, the principal hormone of the testes, produced by the interstitial cells. Major circulating androgen; converted by 5α-reductase in androgen-dependent target tissues to 5α-dehydrotestosterone which is required for normal male sexual differentiation. Also converted by aromatization to Estradiol.Testerone is a controlled substance (anabolic steroid). Androgen.This compound is a contaminant of emerging concern (CECs).
References McFarland, K., et al.: Science, 245, 494 (1989), Heckert, L., et al.: Mol. Endocrinol., 12, 1499 (1998), Themmen, A., et al.: Endocr. Rev. 21, 551 (2000), Kumar, R., et al.: Biol. Reprod., 65, 710 (2001),

Applications A novel bile acid, an analogue of Cholic acid (C432600).
References Yamaga, N., et al.: J. Biochem., 116, 1123 (1994),

Applications A metabolite of Tramadol.
References Lintz, V.W., et al.: Arzneim.-Forsch./Drug Res., 31, II, 11, 1932 (1981)

Applications 17β-neriifolin could be considered a candidate for the treatment of hepatocellular carcinoma. It can also work as an inhibitor of hERG channel trafficking.
References Zhao, Q., et al.:Fitoterapia, 82, 735 (2011); Wang, L., et al.: J. Pharmacol. Exper. Ther., 320, 525 (2007)

Applications Testololactone, is the derivative of Testolactone (T154800), which is an antineoplastic agent that is a derivative of progesterone and is used to treat advanced stage breast cancer.
References Dunkel, L.: Mol. Cell. Endocrinol., 254, 207 (2006); Eugster, E. A.: Treat. Endocrinol., 3, 141 (2004); Holbeck, S.L. et al.: Mol. Cancer Therap., 9, 1451 (2010);

Stability Temperature and Light Sensitive, unstable in solution
Applications Vitamin K1 Hydroxide is a derivative of Vitamin K1 (V676080), which occurs widely in green plants, algae, and photosynthetic bacteria.
References Hassan, M.M.A., et al.: Anal. Profiles Drug Subs., 17, 449 (1988), Breton, J., et al.: Biochemistry, 33, 12405 (1994), Dowd, P., et al.: Science, 269, 1684 (1995),

Stability Hygroscopic
Applications Antihistaminic.
References Berthon, B., et al.: Biochem. Pharmacol., 47, 789 (1994), Hu, Q., et al.: J. Biol. Chem., 274, 33995 (1999),

Impurity Beclomethasone Dipropionate EP Impurity S
Applications Beclomethasone 11,17,21-Tripropionate (Beclomethasone Dipropionate EP Impurity S) is an impurity of Beclomethasone (B131000), a glucocorticoid. Used in chronic asthma and allergic rhinitis. Antiallergic, antiasthmatic (inhalant). Anti-inflammatory (topical).
References Malfitan, V.A., et al.: Clin. Ther., 4, 472 (1982), Rao, M., et al.: J. Asthma, 19, 21 (1982), Small, P., et al.: Ann. Allergy, 49, 127 (1982), Brogden, R.N., et al.: Drugs, 28, 99 (1984),

Applications 3-Ethyl 3,5-Didemethyl 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 Elenolic Acid is an antiviral agent that inhibits reverse transcriptases, inhibited the growth of chicken embryo fibroblast cells as well as Escherichia coli and Bacillus subtilis strains.
References Heinze, J.E., et al.: Antimicrob. Agents Chemother., 8, 421 (1975); Renis, H,E..: Antimicrob. Agents Chemother., 8, 149 (1975)

Applications Caffeidine Acid is a potential degradation product from the hydrolysis of Caffeine (C080100) under alkaline environment.
References Zubair, U.M., et al.: Anal. Profiles Drug Subs., 15, 71 (1986); Cherrah, Y., et al.: Biochem. Pharmacol., 37, 1311 (1988);

Impurity Ambroxol EP Impurity B Hydrochloride
Stability Hygroscopic
Applications Ambroxol Cyclic Impurity is a metabolite as well as an impurity of the bronchosecretolytic drug, Ambroxol (A575900).
References Hammer, R. et al.: Arzneim.-Forsch., 28, 899 (1978); Nieder, M. et al.: HRC & CC, 9, 561 (1986); Huq, F. et al.: J. Pharmacol. Toxicol., 3, 147 (2008);

Applications A labelled nonsteroidal anti-inflammatory drug (NSAID); activity resides primarily in the (S)-isomer.
References Busson, M., et al.: J. Int. Med Res., 14, 53 (1986), Meade, E.A., et al.: J. Biol. Chem., 268, 6610 (1993), Davies, N.M., et al.: Clin. Pharmacokinet., 34, 101 (1998),

Applications trans-β-Farnesene is a sesquiterpene natural product made my different plants to repel pest aphid species.
References Bruce, T., et al.: Pest Manag. Sci., 61, 1115 (2005);

Impurity Olmesartan Medoxomil EP Impurity D
Applications Olmesartan medoxomil intermediate.
References Birkenhager, W., et al.: J. Hypertens, 17, 873 (1999), Whittaker, A., et al.: Br. J. Cardiol., 12, 125 (2005),

Applications Zinc pentamethylenedithiocarbamate (cas# 13878-54-1) is a useful research chemical.

Applications A metabolite of Desoxymetasone (D296970).
References Schriks, M., et al.: Environ. Sci. Technol., 44, 4766 (2010), Baeck, M., et al.: Eur. J. Dermatol., 20, 102 (2010), Lee, P., et al.: Bioorg. Med. Chem. Lett., 20, 69 (2010),

Applications Labelled Torsemide (T548750). Used as a diuretic.
References Lesne, M., et al.: In. J. Clin. Pharmacol. Ther. Toxicol., 20, 382 (1982), Brater, D.C., et al.: Clin. Pharmacol. Ther., 42, 187 (1987),

Applications Labelled Xanthurenic Acid (X743500). Excreted by pyridoxine-deficient animals after the ingestion of tryptophan.
References Aquilina, J., et al.: Biochemistry, 39, 16176 (2000), Roberts, J., et al.: Photochem. Photobiol., 74, 740 (2001),

Applications Trestolone acetate is a derivative of Trestolone (T719600), a synthetic androgen used as a potential hormonal male contraceptive method that induces a state of temporary infertility.
References Garcia-Becerra, R., et al.: Reproduction., 143, 211 (2012); Attardi, B.J., et al.: J. Steroid. Biochem. Molec. Biol., 122, 212 (2010)

Impurity Amlodipine EP Impurity H
Applications Amlodipine Besilate (A633500) impurity. Used in the process for preparing Amlodipine benzenesulfonate. Amlodipine EP Impurity H

Impurity Ezetimibe Tetrahydropyran Impurity
Applications Ezetimibe (E975000) tetrahydropyran impurity.

Stability Light Sensitive
Applications A metabolite of Letrozole.
References Koyama, E., et al.: Ther. Drug Monit., 15, 224 (1993), Pfister, C., et al.: J. Pharm. Sci., 83, 520 (1994), Vander H.Y., et al.: J. Pharm. Biomed. Anal., 24, 723 (2001), Cohen, M., et al.: Clin. Cancer Res., 8, 665 (2002),

Applications The major metabolite of Boldenone, an anabolic steroid.
References Fotsis, T., et al.: J. Steroid Biochem., 28, 203 (1987), Song, Y., et al.: Arch. Pharm. Res., 23, 599 (2000), Buiarelli, F., et al.: Anal. Chim. Acta, 526, 113 (2004), Poelmans, S., et al.: Food Addit. Contam., 22, 808 (2005),

Applications Atorvastatin impurity. Atorvastatin Methyl Ester
References Graul, A., et al.: Drugs Future, 22, 956 (1997),

Stability Light Sensitive, Temperature Sensitive
Applications A metabolite of all-trans Retinoic acid (R250200).
References Idres, N., et al.: Cancer Res., 61, 700 (2001), Taimi, M., et al.: J. Biol. Chem., 279, 77 (2004), Vermot, J., et al.: Science, 308, 563 (2005),

Applications Inhibits the enzyme HMG-CoA reductase in vitro.
References Endo, A., et al.: J. Antibiot., 32, 852 (1979), Alberts, A.W., et al.: Drug Invest., 2 (Suppl. 2), 9 (1990), Kuroda, M., et al.: Biochim. Biophys. Acta, 486, 70 (1977),

Stability Hygroscopic
Applications 3,7,4'-Trihydroxyflavone (cas# 2034-65-3) is a useful research chemical.

Applications Cholesteryl Acetate Dibromide is an brominated intermediate in the synthesis of Cholesterol (C432501) derivatives.
References Kandutsch, A.A., et al.: J. Biol. Chem., 249, 6057 (1974);