Esteroides y derivados

<p>Applications Pregnenolone (P712200) derivative, a steroid hormone involved in the steroidogenesis of progesterone, mineralocorticoids, glucocorticoids, androgens, and estrogens<br>References Bjondahl, K., et al.: Med. Biol., 54, 454 (1976), Geick, A., et al.: J. Biol. Chem., 276, 14581 (2001), Johnson, D., et al.: Toxicol. Sci., 66, 16 (2002), Abe, C., et al.: Lipids, 42, 637 (2007),<br></p>

<p>Applications A Cholesterol (C432501) metabolite. Lathosterol (indicating cholesterol synthesis) and Sitosterol (indicating cholesterol absorption) also decreased with deteriorating health. Low Lathosterol, Sitosterol (S497050), and Cholesterol (C432501) predicted mortality additively and independently of each other.<br>References Chyou, P., et al.: Age Ageing, 29, 69 (2000), Schatz, I., et al.: Lancet, 358, 351 (2001), Bjorkman, M., et al.: Eur. J. Endocrinol., 158, 749 (2008),<br></p>

<p>Applications Sodium Estrone-2,4,16,16-d4 Sulfate (Stabilized with TRIS, 50% w/w) (CAS# 285979-80-8) is a useful isotopically labeled research compound.<br></p>

<p>Impurity Ethinylestradiol EP Impurity B<br>Applications 9,11-Dehydro Ethynyl Estradiol (Ethinylestradiol EP Impurity B) is a degradation product of Ethynyl Estradiol (EE); an impurity of Ethynyl Estradiol (E685100).<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 Pang, C., et al.: Steroids, 23, 203 (1974), Leese, M., et al.: J. Med. Chem., 49, 7683 (2006), Krstic, N., et al.: Steroids, 72, 406 (2007),<br></p>

<p>Impurity Hydrocortisone Acetate EP Impurity E<br>Applications Anecortave (Hydrocortisone Acetate EP Impurity E) is an angiostatic steroid. Used in treatment of macular degeneration.<br>References Clark, A.F., et al.: Expert Opin. Invest. Drugs, 6, 1867 (1997), Slakter, J.S., et al.: Ophthalmology 110, 2372 (2003),<br></p>

<p>Applications Ospemifene is used to treat dyspareunia. It is a selective estrogen receptor modulator (SERM) acting similarly to an estrogen.<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 Rutanen, E., et al.: Menopause, 10, 433 (2003);<br></p>

<p>Impurity USP Exemestane Related Compound C<br>Applications Boldenone related steroid; anabolic androgenic steroid.<br>References Watanabe, K., et al.: J. Appl. Bacteriol., 62, 1511 (1987), Barthakur, S., et al.: J. Basic Microbiol., 36, 383 (1996),Grinenko, G., et al.: Pharmaceut. Chem. J., 36, 510 (2002), Bhat, S., et al.: J. Biol. Chem., 280, 33015 (2005),<br></p>

<p>Applications A metabolite of 17β-Estradiol.<br>References Cushman, M., et al.: J. Med. Chem., 38, 2041 (1995), D’Amato, R.J., et al.: Proc. Natl. Acad. Sci. USA, 91, 3964 (1994), Forsis, T., et al.: Nature, 368, 237 (1994)<br></p>

<p>Applications 5-(4-Fluorophenyl)-2,3-dihydro-3-(1-methylethyl)-2-oxo-N,4-diphenyl-1-[2-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]ethyl]-1H-pyrrole-3-carboxamide is a photodegradation product of Atorvastatin (A791750).<br>References Cermola, F., et al.: Tetrahedron., 62, 7390 (2006);<br></p>

<p>Applications An oxidizing agent, especially in steroid 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></p>

<p>Applications Estradiol derivative which shows antioxidant activity.<br>References Fotsis, T., et al.: J. Steroid. Biochem., 28, 215 (1987), Sack, M., et al.: Lancet, 343, 269 (1994), Brunelli, R., et al.: Biochemistry, 39, 13897 (2000), Li, A., et al.: Nat. Med., 8, 1235 (2002),<br></p>

<p>Stability Light Sensitive<br>Applications A synthetic, nonsteroidal estrogen.<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 Al-Badr, A.A., et al.: Anal. Profiles Drug Subs., 19, 145 (1990),<br></p>

<p>Applications Tetrahydrodehydrocorticosterone inhibits aldosteronogenesis by intact cells at concentrations that inhibited angiotensin binding.<br>References Campanile, C.P., Goodfriend, T.L.: Steroids, 37, 681(1981)<br></p>

<p>Applications Pregnenolone-d6 is the labeled analogue of Pregnenolone (P712200), a steroid hormone involved in the steroidogenesis of progesterone, mineralocorticoids, glucocorticoids, androgens, and estrogens. As such it is a prohormone. Pregnenolone is a GABAA antagonist and increases neurogenesis in the hippocampus. It is a modulator of cytochrome P 450-3A.<br>References Bjondahl, K., et al.: Med. Biol., 54, 454 (1976); Geick, A., et al.: J. Biol. Chem., 276, 14581 (2001); Johnson, D., et al.: Toxicol. Sci., 66, 16 (2002); Abe, C., et al.: Lipids, 42, 637 (2007)<br></p>

<p>Applications 16α-Methylprednisolone is the 16α-Methyl analogue of Prednisolone (P703740). 16α-Methylprednisolone is an anti-inflammatory corticosteroid.<br>References Biju, P. et al.: Bioorg. Med. Chem. Lett., 22, 1086 (2012); Dausse, J.P. et al.: Mol. Pharmacol., 13, 948 (1977):<br></p>

<p>Applications A metabolite of Etonogestrel.<br></p>

<p>Impurity Fulvestrant EP Impurity B<br>Applications A metabolite of Fulvestrant (F862500).<br>References Rao, P., et al.: J. Steroid Biochem., 25, 417 (1986), Wakeling, A., et al.: J. Steroid Biochem. Mol. Biol., 43, 173 (1992), DeFriend, D., et al.: Cancer Res., 54, 408 (1994),<br></p>

<p>Applications Testosterone Undecylenate is an ester metabolite of Testosterone (T155000), which is the main hormone of the testes, produced by the interstitial cells. It is a major circulating androgen; converted by 5α-reductase in androgen-dependent target tissues to 5α-dehydrotestosterone that is required for normal male sexual differentiation. Also converted by aromatization to Estradiol.<br>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);<br></p>

<p>Applications Clobetasol Propionate Impurity E is an impurity of Clobetasol (C583490), which is a topical corticosteroid. Glucocorticoid; anti-inflammatory.<br>References Olsen, E.A., et al.: J. Am. Acad. Dermatol., 15, 246 (1986),<br></p>

<p>Applications A metabolite of Spironolactone.<br>References Gochman, N., et al.: J. Pharmacol. Exp. Ther., 135, 312 (1962), Tori, K., et al.: Steroids, 4, 713 (1964), Solymoss, B., et al.: Toxicol. Appli. Pharmacol., 18, 586 (1971),<br></p>

<p>Impurity Norethindrone Acetate EP Impurity B<br>Applications Δ-5(10)-Norethindrone Acetate (Norethindrone Acetate EP Impurity B) is a Norethindrone Acetate (N675990) impurity. Used in studies of progesterone-binding properties of purified uteroglobin-like protein.<br>References Beato, M. et al.: J. Reprod. Fert., 53, 305 (1978); Schroff, A. P., et al.: Anal. Profiles Drug Subs., 4, 268 (1975); Singh, H., et al.: Am. J. Obstet. Gynecol., 135, 409 (1979);<br></p>

<p>Impurity Betamethasone EP Impurity D<br>Applications Betamethasone 21-O-Ethyl Carbonate (Betamethasone EP Impurity D) is a derivative of Betamethasone (B327000); a glucocorticoid used as an anti-inflammatory agent.4<br>References Ferrante, M.G., et al.: Anal. Profiles Drug Subs., 6, 43 (1977); Li, A., et al.: Chem. Biol. Interact., 142, 7 (2002); Cruz-Monteagudo, M., et al.: Eur. J. Med. Chem., 40, 1030 (2005); Rothfuss, A., et al.: Chem. Res. Toxicol., 19, 1313 (2006); Xiong, Y., et al.: J. Pharmaceut. Biomed., 49, 646 (2009)<br></p>

<p>Applications Labelled Diogoxin (D446575). Cardiotonic. A representative lot is 95.4% d3, 3.4% d2, 1.2% d1 no dectable d0.<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 Aronson, J.K., et al.: Clin. Pharmacokinet, 5,137 (1980), Foss, P.R.B., Anal. Profiles Drug Subs., 9, 207 (1980),<br></p>

<p>Stability Hygroscopic<br>Applications A metabolite of Deflazacort, a systemic corticosteroid, a derivative of prednisolone and used for rheumatoid arthritis and lupus.<br>References Hahn, T.J., et al.: Calcif. Tissue Int., 31, 109 (1980), Cavall-Perin, P., et al.: Eur. J. Clin. Pharmacol., 26, 357 (1984)<br></p>

<p>Impurity Estriol EP Impurity C<br>Applications Estriol Methyl Ether (Estriol EP Impurity C) is a metabolite (1,2) of Estriol (E888960), which is a produced naturally and also a metabolite of Estradiol (E888000). Estriol is a GPR3 antagonist in estrogen receptor-negative breast cancer cells displaying anti-proliferative effects (3).<br>References 1. Marrian, G. et al.: Biochem. J. 1929;23(5):1090-8.2. Rogerson, B. et al.: Arch. Biochem. Biophys. 1986 Oct;250(1):70-85.3. Lappano, R. et al.: Mol Cell Endocrinol. 2010 May 14;320(1-2):162-70.<br></p>

<p>Applications A Cortisone derivative, a glucocorticoid.<br>References Mickelson, K., et al.: Biochemistry, 20, 6211 (1981), Westphal, U., et al.: J. Steroid Biochem., 19, 1 (1983),<br></p>

<p>Impurity Fluocinolone Acetonide EP Impurity G<br>Applications Flurandrenolone Acetate, is the derivative of Flurandrenolide (F598650), which is a Glucocorticoid, used as an antipsoriatic.<br>References Pearlman, R., et al.: Int. J. Pharm., 18, 53 (1984), Neufeld, E., et al.: J. Chromatogr., 718, 273 (1998),<br></p>

<p>Applications Estra-5(10),9(11)-diene-3,17-dione, can be used as an intermediate for the synthesis of 3-keto-desogestrel.<br>References Wang, R., et al.: Zhongguo Yaowu Huaxue Zazhi, 4, 187 (1994);<br></p>

<p>Applications Prednival was used in the study of inflammation-inhibiting activity of steroids.<br>References Bodor, N., et al.: J. Med. Chem., 26, 318 (1983); Stouch, T., et al.: J. Med. Chem., 29, 2125 (2986);<br></p>

<p>Applications A metabolite of the neuroactive steroid Progesterone (PROG) (P755900).<br>References Wiebe, J., et al.: Cancer Res., 60, 936 (2000), Lacasa, D., et al.: J. Biol. Chem., 276, 11512 (2001), Johansson, I., et al.: Brain Res., 934, 125 (2002), Leonhardt, S., et al.: Steroids, 68, 761 (2003),<br></p>

<p>Applications 7α-Hydroxy-4-cholesten-3-one is a metabolite of Cholesterol (C432501).<br>References Connor, W., et al.: J, Clin. Invest., 48, 1363 (1969), Nestel, P., et al.: Metabolism, 24, 189 (1975), Ellegard, L., et al.: Eur. J. Clin. Nutr., 45, 451 (1991), Pedersen, A., et al.: J. Lipid Res., 41, 1901 (2000),<br></p>

<p>Applications 17,21-Dihydroxy-16α-methylpregna-1,4,9(11)-triene-3,20-dione 21-Acetate is an intermediate in the synthesis of Mometasone Furoate (M490000), a tropical corticosteroid used as an anti-inflammatory agent.<br>References Spangler, M., et al.: Chromatograph., 54, 329 (2001); Reeves, E.K., et al.: Bioorg. Med. Chem., 21, 2241 (2013);<br></p>

<p>Stability Hygroscopic<br>Applications 16α-Hydroxyprrogesterone is a hydroxylated metabolite of Progesterone (P755900). 16α-Hydroxyprogesterone binds to human progesterone receptors hPR-A and hPR-B and act as an agonist for both receptors.<br>References Ikonen, M. et al.: Nature, 212, 716 (1966); Storbeck, K.-H. et al.: Mol. Cell. Endocrinol., 336, 92 (2011);<br></p>

<p>Impurity Betamethasone Dipropionate EP Impurity D<br>Applications Betamethasone 21-acetate-17-propionate (Betamethasone Dipropionate EP Impurity D) is a related compound of Betamethasone dipropionate (B327005).<br>References Grootveld, M., et al.: Biochem. Pharmacol., 37, 271 (1988), Chen, B., et al.: Steriods, 74, 30 (2009), Mikami, E., et al.: J. Pharm. Biomed. Anal., 28, 261 (2002),<br></p>

<p>Pregnenolone monosulfate (3β-Hydroxy-5-pregnen-20-one monosulfate) is a potent nootropic steroid used in the study of neuroticism and depression.</p>

<p>Applications Palovarotene, is a highly selective retinoic acid receptor gamma (RAR-γ) agonist that is under investigation as a potential treatment for emphysema.<br>References Hind, M., et al.: Curr. Opinion Invest. Drugs, 10(11), 1243 (2009); Stolk, J., et al.: Therap. advances Respi. dise., 4, 319 (2010);<br></p>

<p>Applications Testosterone and epitestosterone are endogenous steroids that differ in the configuration of the hydroxyl-bearing carbon at C-17. Testosterone is the predominant male sex hormone, whereas the role of epitestosterone is largely unclear. In humans, both androgens are excreted mainly as glucuronide conjugates.<br>References Wudy, S., et al.: Steroids, 66, 759 (2001), Kootstra, P., et al.: Anal. Chim. Acta., 586, 82 (2007), Sten, T., et al.: Drug Metab. Dispos., 37, 417 (2009),<br></p>

<p>Applications Isotope labelled 17β-Estradiol (E888000), which is the major estrogen (1) secreted by the premenopausal ovary (2).Drinking water contaminant candidate list 3 (CCL 3) compound as per United States Environmental Protection Agency (EPA), environmental, and food contaminants.<br>References 1. Salole, E. et al.: Anal. Profiles Drug Subs. 1986 15, 23 283-3182. Lievertz, R. et al.: Am. J. Obstet. Gynecol. 1987 May;156(5):1289-93.<br></p>

<p>Applications A metabolite of Tibolone. A synthetic steroid with weak estrogenic, androgenic and progestogenic activity. A pharamceutical used in the treatment of menopausal syndrome.<br>References Belman, S., et al.: Cancer Res., 32, 450 (1972), Shirahashi, H., et al.: Chem. Pharm. Bull., 41, 1664 (1993), Hoyte, R., et al.: Steroids, 58, 13 (1993), Sandker, G., et al.: Xenobiotica, 24, 143 (1994), Colombo, D., et al.: Eur. J. Med. Chem., 40, 69 (2005),<br></p>

<p>Applications A next-generation selective estrogen receptor modulator for treating disorders associated with increased bone turnover and osteopenia.<br>References Baumann, R., et al.: Biochem. Pharmacol., 55, 841 (1998), Ammann, P., et al.: Osteoporos Int., 10, 369 (1999), Alexandersen, P., et al.: J. Clin. Endocrinol. Metab., 86, 755 (2001), Bourrin, S., et al.: Bone, 30, 195 (2002), Buzdar, A., et al.: J. Clin. Oncol., 21, 1007 (2003),<br></p>

<p>Applications A metabolite of Estradiol. It is an estrogenic steroid synthesized exclusively by the fetal liver during human pregnancy and reaching the maternal circulation through the placenta.<br>References Gurpide, E., et al.: J. Clin. Endocrinol., 26, 1355 (1966), Hagen, A., et al.: J. Clin. Endocrinol., 30, 763 (1970), Schollberg, K., et al.: Exp. Clin. Endocrinol., 85, 204 (1985), Coelingh Bennink, H., et al.: Contraception, 77, 186 (2008),<br></p>

<p>Impurity Betamethasone Acetate EP Impurity C<br>Applications Betamethasone 11β,21-Diacetate is an impurity of Betamethasone 21-Acetate (B327025); a glucocorticoid steroid with anti-inflammatory and immunosuppressive properties which can be used in treatment of asthma and itching.<br>References Kerns, E., et al.: J. Pharm. Sci., 90, 1838 (2001); Seidler, J., et al.: J. Med. Chem., 46, 4477 (2003); Alsenz, J., et al.: J. Pharm. Sci., 96, 1748 (2007)<br></p>

<p>Applications It is a potent and tissue-selective androgen receptor modulator (SARM) used as antiosteoporotic agent.<br>References Samnegard, E., et al.: Bone, 28, 414 (2001), Hanada, K., et al.: Biol. Pharm. Bull., 26, 1563 (2003), Kearbey, J., et al.: Xenobiotica, 34, 273 (2004), Kearbey, J., et al.: Xenobiotica, 34, 273 (2004), Kearbey, J., et al.: Pharm. Res., 24, 328 (2007),<br></p>

<p>Applications Progesterone 3-(O-carboxymethyl)oxime is used in microtitre plate enzyme immunoassays (EIAs) for progesterone.<br></p>

<p>Applications Dihydrodigoxin is a cardioinactive metabolite of Digoxin (D446575) that gets excreted in the urine after Digoxin administration in humans.<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 Clark, D.R., et al.: Drug Metab. Dispos., 2, 148 (1974); Reuning, R.H., et al.: Drug Metab. Dispos., 13, 51 (1985); Butler, V.P., et al.: Pharmacology, 221, 123 (1982)<br></p>

<p>Impurity Progesterone 17?-Hydroxy Impurity<br>Applications 17α-Hydroxy Progesterone is a metabolite of Progesterone (P755900). It was isolated from adrenal glands.<br>References Pfiffner, N., et al.: J. Biol. Chem., 132, 459 (1940), Florey, K., et al.: Anal. Profiles Drug Subs.,4, 209 (1975),<br></p>

<p>Impurity Estriol EP Impurity E<br>Applications 17-Epiestriol (Estriol EP Impurity E) is a metabolite of Estradiol.<br>References Marrian, B., et al.: Biochem. J., 59, 136 (1955), Dietel, M., et al.: Cancer Res., 50, 6100 (1990), Schumacher, G., et al.: Clin. Cancer Res., 5, 493 (1999), Robert, J., et al.: J. Med. Chem., 46, 4805 (2003),<br></p>

<p>Applications The 17β-metabolite of Equilin (E592800).<br>References Enmark, E., et al.: J. Clin. Endocrinol. Metab., 82, 4258 (1997), Wang, Z., et al.: J. Med. Chem., 43, 2419 (2000), Jiang, X., et al.: Steroids, 71, 334 (2006),<br></p>

<p>Stability Hygroscopic<br>Applications Dexamethasone 21-Phosphate Dimer is a derivative of Dexamethasone (D298800), a glucocorticoid used as an anti-inflammatory agent. Dexamethasone regulates T cell survival, growth, and differentiation. Dexamethasone inhibits the induction of nitric oxide synthase.<br>References Wershil, B.K., et al.: Int. Arch. Allergy Immunol., 107, 323 (1995), Riccardi, C., et al.: Cell Death Diff., 6, 1182 (1999), Llanos, S.L. and Roldan, A.: Bio Cell, 23, 29 (1999)<br></p>

<p>Applications A systemic corticosteroid. A derivative of prednisolone. Used for rheumatoid arthritis and lupus.<br>References Nathansohn, G., et al.: J. Med. Chem., 10,799 (1967), Schiatti, P., et al.: Arzneim. Forsch., 30, 1543 (1980), Cavall-Perin, P., et al.: Eur. J. Clin. Pharmacol., 26, 357 (1984), Imbimbo, B., et al.: Adv. Exp. Med. Biol., 171, 241 (1984),<br></p>

<p>Impurity Levonorgestrel EP Impurity P<br>Applications 5(6)-Dehydro-4(5)-dihydro D-(-)-Norgestrel (Levonorgestrel EP Impurity P) is a Norgestrel (N689500) impurity.<br></p>

<p>Applications A labelled metabolite of Pregnenolone (P712200).<br>References Kramer, R., et al.: J. Steroid Biochemi., 18, 715 (1983), Hiwatashi, A., et al.: J. Biochem., 98, 619 (1985), Eiichi, T., et al.: J. Pharmacol. Sci., 95, 140 (2004),<br></p>

<p>Atorvastatin epoxy tetrahydrofuran impurity is a byproduct of the synthesis process. It is a white crystalline powder that is soluble in organic solvents and sparingly soluble in water. Atorvastatin epoxy tetrahydrofuran impurity has been shown to be an impurity of atorvastatin. It is not known to have any biological activity, but it may pose a health risk if present in large quantities.</p>

<p>Please enquire for more information about Defluoro atorvastatin acetonide tert-butyl ester including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>Difluoro atorvastatin is a filtrate of atorvastatin, which is a cholesterol-lowering drug. It is synthesized by reacting butyric acid with atorvastatin in an organic solvent. The reaction solution was filtered to remove impurities and then purified by liquid chromatography. The product was characterized by diffraction and LC-MS analysis. Difluoro atorvastatin has a high purity and is suitable for further use in the preparation of pharmaceuticals.</p>

<p>O-Methyl atorvastatin calcium is a drug product that is an HPLC standard. It is a natural metabolite of atorvastatin, which is synthesized by cytochrome P450 3A4 in the liver. O-Methyl atorvastatin calcium has been shown to be an impurity in some batches of atorvastatin calcium. It has been observed to have pharmacological effects similar to those of atorvastatin. O-Methyl atorvastatin calcium has been used as a research and development (R&amp;D) tool for studies on the metabolism of drugs, including its own synthesis and the study of the effect on other drugs such as amiodarone.</p>

<p>Calcipotriol EP Impurity B is a drug product that is an impurity in Calcipotriol EP. It is produced during the synthesis of calcipotriol and may be present in the natural product. It has been shown to have anti-inflammatory properties, and can be used as a research tool to study calcipotriol metabolism.</p>

<p>Atorvastatin lactone is a prodrug for atorvastatin. It is an inhibitor of the enzyme HMG-CoA reductase, which is involved in cholesterol synthesis and reduces LDL cholesterol levels. Atorvastatin lactone is absorbed from the gut into the bloodstream and then converted to atorvastatin, which has a higher potency than atorvastatin lactone. This conversion occurs in the liver by cytochrome P450 enzymes, including cytochrome CYP3A4. The pharmacokinetics of atorvastatin lactone are influenced by drugs that inhibit these enzymes. Atorvastatin and its metabolites are excreted in human serum as glucuronide or sulfate conjugates.</p>

<p>Fluticasone Propionate EP Impurity F is an impurity of Fluticasone Propionate. Fluticasone Propionate is a synthetic glucocorticoid used in the treatment of asthma and other allergic disorders. Impurity F is a metabolite of Fluticasone Propionate and has been detected in human plasma at low levels (5% of total fluticasone propionate). The metabolism of Fluticasone Propionate to Impurity F has been studied in rat, mouse, dog and man.<br>br&gt;br&gt;<br>The following table summarizes the metabolic pathways that have been identified for this impurity:<br>br&gt;br&gt;<br>Metabolism studies indicate that Impurity F is mainly metabolized by CYP3A4 to form conjugates with glucuronic acid or sulfates. It may also be hydrolyzed to form 5α-flurostan-3β,17β-d</p>

<p>(3R,5S)-Atorvastatin sodium salt is a synthetic compound that is used in the treatment of high cholesterol. It belongs to the class of statins, which are used for lowering blood cholesterol levels. The drug product contains at least 99% by weight of (3R,5S)-atorvastatin sodium salt. This product also has an analytical purity greater than 98%. It is metabolized via oxidation and hydroxylation to form metabolites that exhibit pharmacological activity similar to the parent molecule. (3R,5S)-Atorvastatin sodium salt is a natural product that can be found in plants such as yew trees. This drug has been shown to have niche applications in drug development and research and development.</p>

<p>Calcipotriol EP Impurity H is an impurity found in calcipotriol EP. It is a metabolite of calcipotriol EP, which is the active ingredient in Dovonex. Calcipotriol EP Impurity H can be detected by HPLC with a retention time of 11.5 minutes and its purity can be determined by UV spectroscopy at 254 nm with a purity of &gt;98%. Calcipotriol EP Impurity H can also be synthesized from natural or synthetic sources.</p>

<p>Beta-Epoxyabiraterone acetate is a synthetic and natural metabolite of abiraterone that is used as an API impurity in the synthesis of abiraterone acetate. The drug product is a niche compound with CAS No. 52464-96-6. The Metabolite is an impurity found in the synthesis of beta-epoxyabiraterone acetate. Drug development research and development, analytical methods, and pharmacopoeia are all involved in the production of this compound.</p>

<p>Defluoro atorvastatin calcium is a bulk drug that has been approved to be used as an adjunct to diet to reduce elevated cholesterol levels in adults. Defluoro atorvastatin calcium is the desfluoro-enantiomer of atorvastatin, which is a statin that inhibits the enzyme HMG-CoA reductase. This enzyme catalyzes the conversion of HMG-CoA to mevalonic acid, which is an early step in the synthesis of cholesterol. The fluoro group on defluoro atorvastatin calcium is not expected to have any significant effect on its potency or metabolic pathways and any impurities are not expected to have any therapeutic effect.</p>

<p>Calcipotriol EP Impurity G is an impurity in calcipotriol, which is a drug product. Calcipotriol EP Impurity G has a CAS number of 126825-26-3 and is a natural metabolite of calcipotriol. It is also known as calcipotriol EP Impurity G or calcipotriol EPIG. It has been shown to be an analytical impurity in calcipotriol, and it has been detected by HPLC analysis. Calcipotriol EP Impurity G can be used for research and development, as well as for the production of pharmacopoeia standards.</p>

<p>Fluoxetine is a selective serotonin reuptake inhibitor that is used to treat major depressive disorder, obsessive-compulsive disorder (OCD), bulimia nervosa, panic disorder, premenstrual dysphoric disorder (PMDD), and social anxiety disorder. It is also used as an appetite suppressant in some countries. Fluoxetine inhibits the neuronal uptake of serotonin by blocking the presynaptic transporter protein. The most common adverse effects are nausea, diarrhea, drowsiness, dry mouth, blurred vision and sexual dysfunction.</p>

<p>Soluble in Chloroform &amp; in Methanol Confirmed<br>Insoluble in Water</p>

<p>Atorvastatin epoxydione impurity (EPI) is a heptanoic, hydrate, diastereoisomer, racemic mixture, enantiomer and impurity of Atorvastatin. The EPI has been minimized in the formulation process by using a novel synthesis route that employs a chiral pyrrole derivative as an intermediate. This minimization has allowed for the elimination of the tautomer and other impurities present in the original compound.</p>

<p>Atorvastatin is a drug product that is metabolized to atorvastatin epoxy pyrrolooxazin tricyclic impurity. Due to the presence of this impurity, the purity of the drug product is not 100%. Atorvastatin epoxy pyrrolooxazin tricyclic impurity is a natural metabolite with CAS number 516-80-1. It has been shown to have effects on metabolism and may be involved in the development of atherosclerosis. Metabolism studies have been conducted on animals, but not humans.</p>

<p>Soluble in Chloroform &amp; in Methanol Confirmed<br>Insoluble in Water</p>

<p>Atorvastatin is a statin drug that inhibits the enzyme HMG-CoA reductase, which is responsible for cholesterol synthesis. Atorvastatin is used to lower LDL cholesterol and total cholesterol levels in the blood. It also lowers triglyceride levels and raises HDL cholesterol levels. Atorvastatin has been shown to inhibit fibrinogen production, reduce TNF-α production, and improve body mass index (BMI) in obese patients. This drug has been shown to be effective in reducing the size of atherosclerotic lesions by decreasing the amount of cholesteryl esters transferred from high-density lipoprotein (HDL) to low-density lipoprotein (LDL). It has also been shown to inhibit collagen production and stimulate muscle cell proliferation.</p>

<p>(5α)-17-(3-Pyridinyl)androst-16-en-3-one is a natural metabolite of testosterone that is produced in the liver. It has been identified as an impurity in API, which can be found in drugs used for the treatment of high blood pressure and prostate cancer. (5α)-17-(3-Pyridinyl)androst-16-en-3-one is not active as a drug itself, but it can be used as a standard to study the metabolism of testosterone and other steroids.</p>

<p>Dutasteride impurity D is a natural impurity found in dutasteride and has been reported to be an analytical marker for dutasteride. It is also used as an impurity standard, HPLC standard, and custom synthesis for drug development. Metabolism studies have shown that the major route of elimination for Dutasteride impurity D is through glucuronidation with minor amounts being excreted in urine unchanged.</p>

<p>Desfluoro atorvastatin is a crystalline polymorph of atorvastatin that has been shown to have improved flowrate and dissolution profile compared with the conventional form. Desfluoro atorvastatin is synthesized by adding a fluorine atom to a specific position in the molecule. The synthesis procedure includes chromatographic purification and analysis of impurities, which are then eliminated by diode laser irradiation. Impurities may also be eliminated through hydrogenation or recrystallization.</p>

<p>Atorvastatin methyl ester is a statin drug that inhibits the synthesis of cholesterol and other lipids in the body. It is used to reduce high levels of low-density lipoprotein (LDL) cholesterol, which may lead to heart disease or stroke. Atorvastatin methyl ester has been shown to be effective in reducing the uptake of LDL cholesterol into cells by preventing the formation of LDL particles. This drug also decreases the production of biphosphate-containing phospholipids, which are essential for dendritic cell maturation. The crystalline polymorphs have been characterized by X-ray diffraction and microscopy. Impurities can be detected using ultraviolet spectroscopy, infrared spectroscopy, or nuclear magnetic resonance spectroscopy.</p>

<p>3-Oxo-4-aza-5a-androst-1-ene-17b-carboxylic acid is a covalently bonded prodrug that is metabolized to its active form, finasteride, in the body. It has been shown to have physiological activities such as skin permeation and cell growth. 3-Oxo-4-aza-5a-androst-1-ene 17b carboxylic acid also has immunotherapy properties and can be conjugated with other compounds for use in cancer treatment.</p>

<p>Hydrocortisone 21-Aldehyde (Hydrate</p>

<p>Atorvastatin impurity F is an impurity that can be found in atorvastatin. It is a white to off-white crystalline solid with a melting point of 142°C. It has a molecular weight of 273.5 and chemical formula of C14H13N3O2. This impurity can be found in atorvastatin as an API impurity, which may have an effect on the efficacy or toxicity of the drug product. Impurities are present in all pharmaceutical products and should be identified, characterized, and quantified for quality control purposes. Impurities are often unavoidable byproducts of the manufacturing process and can lead to potential safety concerns if they are not detected early on during drug development. The presence of impurities may also affect the pharmacological effects or therapeutic efficacy of the drug product.</p>

<p>Soluble in Chloroform &amp; in Methanol Confirmed<br>Insoluble in Wate</p>

<p>Racemic 3-Oxo atorvastatin sodium salt (3OAS) is a drug product that has been tested in the laboratory and found to be suitable for further development. It is a natural substance that has not been chemically synthesized. Racemic 3-Oxo atorvastatin sodium salt is an impurity standard that can be used to establish the purity of API drugs. It can also be used as a metabolite in metabolism studies. Racemic 3-Oxo atorvastatin sodium salt is high purity and can be used for niche applications such as pharmacopoeia production.</p>