Steroidi e Derivati

<p>Applications D-Digitoxose is a derivative of D-ribo-Hexonic acid that is metabolized in the liver. It inhibits glucose-stimulated insulin release.<br>References Domschke, W. et al.: Naun.-Schmied. Arch. Pharmacol., 265, 149 (1969); Brown, D.F. et al.: Experientia, 39, 979 (1983); Hussain, M. et al.: Biochem. Biophys. Res. Comm., 129, 358 (1985);<br></p>

<p>Applications Labelled Estradiol. Estradiol (known as α-Estradiol or 17 α-Estradiol) is a biologically active estrogen in human breast cancer cells in tissue culture. 17-Εstradiol and its selective receptor, ER-X, are not part of a classical hormone/receptor endocrine system but of a system with important autocrine/paracrine functions in the developing and adult brain. 17-Estradiol may have enormous implications for hormone replacement strategies at the menopause and in the treatment of such neurodegenerative disorders as Alzheimer’s disease and ischemic stroke.<br>References Salole, E.G., Anal. Profiles Drug Subs., 15, 283 (1986), Lievertz, R.W., et al.: Am. J. Obstret. Gynecol., 156, 1289 (1987), Kuhnz, W., et al.: Arzneim.-Forsch., 43, 966 (1993),<br></p>

<p>Applications The 17α-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>Applications Gestrinone is a Steroidal antiestrogen, antiprogestogen, analog of Norgestrienone. Antigonadotropin.Controlled substance.<br>References Azadian-Boulanger, G., et al.: Am. J. Obstet. Gynecol., 125, 1049 (1976), Thomas, E.J., et al.: Br. Med. J., 294, 272 (1987), Coutinho, E.M., et al.: Fertil. Steril., 49, 418 (1988),<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 (3α)-Allopregnanolone acts as a GABAA receptor positive allosteric modulator. (3α)-Allopregnanolone is a metabolite of Progesterone (P755900). (3α)-Allopregnanolone is a neuroactive steroid present in the blood and also the brain. In 2019, the US Food and Drug Administration approved (3α)-Allopregnanolone as an intravenous infusion for treating postpartum depression.<br>References Puja, G. et al.: Neuron, 4, 759 (1990); Belelli, D. et ael. Neurosteroid, 6, 565 (2006); Viapiano, M. et al.: Neurochem. Res., 23, 155 (1998);<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>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>Applications 5,6-Dehydro-17α-dutasteride is an epimer of 5,6-Dehydro-17β-dutasteride (D229560) an impurity in the synthesis of Dutasteride (D735000), a dual inhibitor of 5α-reductase isoenzymes type 1 and 2; structurally related to Finasteride (F342000). Dutasteride is used in the treatment of benign prostatic hyperplasia.<br>References Bakshi, R.K., et al.: J. Med. Chem., 38, 3189 (1995), Gisleskog, P.O., et al.: Brit. J. Clin. Pharmacol., 47, 53 (1999), Djavan, B., et al.: Expert Opin. Pharmacother., 6, 311 (2005),<br></p>

<p>Applications di(2-Hydroxy Atorvastatin) Calcium Salt is a metabolite of Atorvastatin Calcium Salt (A791750), 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.<br>References Kearney, A.S., et al.: Pharm. Res., 10, 1461 (1993); Heinonen, T.M., et al.: Clin. Ther., 18, 853 (1996); Whitfield, L.R., et al.: Eur. J. Drug Metab. Pharmacokinet., 25, 97 (2000)<br></p>

<p>Applications Tetrahydrocortisol is excreted in large amounts in premenopausal patients with early breast cancer. Tetrahydrocortisol has been found to be produced by lymphocytes in both normal and cancer bearing patients however, the concentration of Tetrahydrocortisol has increased in patients with cancer.<br>References Kodama, M., et. al.: J. Natl. Cancer I., 54, 1275 (1975); Klein, A., et. al.: Metabolism, 27, 731 (1978)<br></p>

<p>Applications Prednisolone (P703740) metabolite.<br>References Garg, V., et al.: Biopharm. Drug Disposition, 15, 163 (1994), Adham, N., et al.: Proc. Biochem., 38, 897 (2003),<br></p>

<p>Applications 21-Dehydro Betamethasone is an impurity of Betamethasone (B327000), a corticosteroid used as an anti-inflammatory agent.<br>References Chen, B., et al.: Steroids, 74, 30 (2009); Li, M., et al.: J. Pharm. Sci., 98, 894 (2009); Xiong, Y., et al.: J. Pharm. Biomed. Anal., 49, 646 (2009);<br></p>

<p>Applications 3,3-Dimethoxyestra-5(10),9(11)-dien-17-one, can be used for the synthesis of Trenbolone Acetate (T719080).<br>References Zhang, H., et al.: Fudan Xuebao, Yixueban, 29 (3), 211 (2002);<br></p>

<p>Applications A degradation and metabolic intermediate of Dexamethasone (D298800). A Dexamethasone enol aldehyde as inflammation inhibitor.<br>References Weiss, G., et al.: J. Clin. Endocrinol. Metab., 43, 696 (1976), Hirschmann R., et al.: Steroids, 57, 579 (1992),<br></p>

<p>Applications Cardiotonic.<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>Applications Cortisone (C696500) derivative.<br></p>

<p>Impurity Betamethasone Dipropionate EP Impurity U<br>Applications Betamethasone 9,11-Epoxide 17-Propionate (Betamethasone Dipropionate EP Impurity U) is an impurity of Betamethasone (B327000), an antiinflammatory agent.<br></p>

<p>Applications Testosterone Octanoate is a metabolite of testosterone (T155000), which is used in biological studies to determine the hemolytic and lipophilic activity of this anabolic steroid.<br>References Biagi, G.L., et al.: J. Med. Chem., 13, 944 (1970); Biagi, G. L., et al.: J. Med. Chem., 18, 873 (1975)<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>Impurity Cyproterone Acetate EP Impurity F<br>Applications Cyproterone (Cyproterone Acetate EP Impurity F) is an antiandrogen, suppresses Testosterone and its metabolites. Derivatives of Cyproterone are administered to patients suffering from hypersexuality and to help facilitate the sexual transformation of male-to-female transsexuals.<br>References Gracia, T., et al.: Toxicol. App. Pharmacol., 225, 142 (2007), Ahlin, G., et al.: J. Med. Chem., 51, 5932 (2008), Gohil, V., et al.: Nat. Biotechnol., 28, 249 (2010), Bovee, T., et al.: J. Steroid Biochem. Mol. Biol., 118, 85 (2010),<br></p>

<p>Applications A metabolite of Norgestimate. Note- The oxime isomerizes when: 1) Heated in any solvent or heating the crystalline form 2) Dissolved in MeOH at room temperature very quickly 3) Dissolved in acetone or CHCl3 at room temperature in a couple of hours at room temperature4) In EtOAc or EtOAc/isooctane over a couple of days at RT. It is stable in the crystalline form.<br>References Phillips, A., et al.: Steroids, 55, 373 (1990)<br></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 Progesterone 3-(O-carboxymethyl)oxime is used in microtitre plate enzyme immunoassays (EIAs) for progesterone.<br></p>

<p>Applications Dexamethasone Hemisuccinate is a derivative of Dexamethasone (D298800); a glucocorticoid used as an anti-inflammatory agent. It regulates T cell survival, growth, and differentiation. Dexamethasone also 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 The trans metabolite of Latanoprost (L177280), Prostaglandin analog.<br>References Botchkareva, N., et al.: FASEB J., 115, 645 (2001),<br></p>

<p>Applications Δ7-Stigmasterol is an analog of Stigmasterol (S686750); a plant sterol that is used as a precursor in the synthesis of progesterone.<br>References Han, P., et al.: Biotechnol. App. Biochem., 54, 105 (2009); Matsunaga, I., et al.: Anal. Biochem., 393, 222 (2009); Huang, C., et al.: Plant Physiol., 150, 1192 (2009)<br></p>

<p>Impurity Budesonide EP Impurity L<br>Applications 11-Keto Budesonide (Budesonide EP Impurity L) is an impurity of Budesonide (B689490), an antiinflammatory agent.<br>References Brattsand, R., et al.: J. Steroid Biochem., 16, 779 (1982), Clissold, S., et al.: Drugs, 28, 485 (1984), Edsbacker, S., et al.: Drug Metab. Dispos., 15, 403 (1987), Pozo, O., et al.: Anal. Bioanal. Chem., 398, 1759 (2010),<br></p>

<p>Stability Light Sensitive<br>Applications 3β-Hydroxydesogestrel is a metabolite of Desogestrel (D296875), a progestogen with low androgenic potency.<br>References Viinikka, L., et al.: Eur. J. Clin. Pharmacol., 15, 349 (1979), Bergink, E.W., et al.: J. Steroid Biochem., 14, 175 (1981)<br></p>

<p>Applications Testosterone (T155000) derivative. It is a potent androgen with anabolic properties. Since the begining of the year 2005, the use of steroid precursors (prohormones) is illegal in the United States. Controlled substance.<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 Liao, S., et al.: J. Biol. Chem., 248, 6154 (1973), Saartok, T., et al.: Endocrinology, 114, 2100 (1984), Sugawara, T., et al.: J. Biol. Chem., 278, 42487 (2003),<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>Applications 6β-Hydroxy Dutasteride is a hydroxylated derivative of Dutasteride (D735000).<br></p>

<p>Applications Steroid hormone produced by the corpus luteum. Induces maturation and secretory activity of the uterine endothelium; suppresses ovulation. Progesterone is implicated in the etiology of breast cancer.<br>References Anderson, E., et al.: Breast Cancer Res., 4, 197 (2002), Lanari, C., et al.: Breast Cancer Res., 4, 240 (2002), Albrecht, E.D., et al.: Front. Biosci., 8, 416 (2003), Qiu, M., et al.: J. Steroid Biochem. Mol. Biol., 85, 147 (2003),<br></p>

<p>Applications Dutasteride is a dual inhibitor of 5α-reductase isoenzymes type 1 and 2; structurally related to Finasteride (F342000). Dutasteride is used in the treatment of benign prostatic hyperplasia.<br>References Bakshi, R.K., et al.: J. Med. Chem., 38, 3189 (1995), Gisleskog, P.O., et al.: Brit. J. Clin. Pharmacol., 47, 53 (1999), Djavan, B., et al.: Expert Opin. Pharmacother., 6, 311 (2005),<br></p>

<p>Applications (5α)-Pregnane-3,20-dione exerts neuroprotective effects in chronic autoimmune encephalomyelitis (EAE). The neuroactivity of the steroid acts as a therapeutic agent for multiple sclerosis.<br>References Caruso, D. et al.: J. Neuroendocrinol., 24, 851 (2012);<br></p>

<p>Applications A labelled progestogen with low androgenic potency.<br>References Viinikka, L., et al.: Eur. J. Clin. Pharmacol., 15, 349 (1979), Bergink, E.W., et al.: J. Steroid Biochem., 14, 175 (1981)<br></p>

<p>Applications Cholesterol is a major component of all biological membranes; ~25% of total brain lipid is Cholesterol. Cholesterol is the principal sterol of the higher animals. Cholesterol was found in all body tissues, especial in the brain, spinal cord, and in animal fats or oils. Cholesterol is the main constituent of gallstones. This compound is a contaminant of emerging concern (CECs).<br>References Rosin, Z., et al.: Physiol. Chem., 124, 282 (1923), Schoenheimer, et al.: J. Biol. Chem., 105, 355 (1934), Gemant, et al.: Life Sci., 1, 233 (1962), Johnson, K., et al.: 4, 457 (1964),<br></p>

<p>Applications Anti-inflammatory.<br>References Phillips, et al.: Toxicol. Appl. Pharmacol., 20, 522 (1971), Sanen, F.J., et al.: Int. J. Clin. Pharmacol. Biopharm., 12, 174 (1975), Tarayre, J.P., et al.: Pharmacol., 19, 323 (1979).<br></p>

<p>Impurity Dutateride EP Impurity C<br>Applications Ethyl 3-Oxo-4-aza-5α-androst-1-ene-17β-carboxylate (Dutateride EP Impurity C) is a compound synthesized in the production of azasteroids. Used in the inhibition of 5α-reductase and of androgen receptor binding, both major effecters in the male hormonal system.<br>References Ramusson, G. et al.: J. Med. Chem., 29, 2298 (1986);<br></p>

<p>Applications The major metabolite of the progestational agent Norgestrel (N689500).<br>References DeJongh, D.C. et al.: Steroids, 11, 649 (1968); Uniyal, J.P. et al.: Acta Endocrinol., 84, 155 (1977); Sisenwine, S.F. et al.: Drug Metab. Disp., 7, 1 (1979);<br></p>

<p>Applications A 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>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.<br>References Smith, S., et al.: Am. J. Cardiol., 80, 10H (1997), Jacobsen, W., et al.: Drug Metab. Dispos., 28, 1369 (2000), Istvan, E., et al.: Science, 292, 1160 (2001), Tabernero, L., et al.: J. Biol. Chem., 278, 19933 (2003), Bratton, L., et al.: Bioorg. Med. Chem., 15, 5576 (2007),<br></p>

<p>Impurity Estradiol EP Impurity C<br>Applications 4-Methyl Estradiol (Estradiol EP Impurity C) is an impurity of Estradiol (E888000).<br>References Zhu, B., et al.: Steroids, 70, 225 (2005), Enmark, E., et al.: J. Clin. Endocrinol. Metab., 82, 4258 (1997),<br></p>

<p>Impurity Ethinylestradiol EP Impurity A<br>Applications 17-epi-Ethynyl Estradiol (Ethinylestradiol EP Impurity A) is the epimer derivative of Ethynyl Estradiol (E685100). An impurity.<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 Pomper, M., et al: J. Med. Chem., 33, 3143 (1990), Vulliet, E., et al.: Anal. Bioanal. Chem., 387, 2143 (2007), Muller, M., et al.: Environ. Toxicol. Chem., 27, 1649 (2008),<br></p>

<p>Applications Dexamethasone-biotin is biotin labelled Dexamethasone. Dexamethasone is 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 5β-Pregnane-3α,20α-diol is a metabolite of Progesterone (P755900).<br>References Beall, et al.: Biochem. J., 31, 35 (1937), Okuda, A., et al.: J. Biol. Chem., 259, 7519 (1984), Russell, D., et al.: Biochemistry, 31, 4737 (1992), Kondo, K., et al.: Eur. J. Biochem., 219, 357 (1994), Westerbacka, J., et al.: J. Clin. Endocrinol. Metab., 88, 4924 (2003),<br></p>

<p>Applications Estradiol (E888000) derivative. An estrogen.<br>References Salole, E.G., et al.: Anal. Profiles Drug Subs., 15, 283 (1986), Lievertz, R.W., et al.: Am. J. Obstet. Gynecol., 156, 1289 (1987),<br></p>

<p>Applications 6β-Hydroxy-11-deoxycortisol is a corticosteroid which is a metabolite of Cortisol (H714615), a steroid hormone, more specifically a glucocorticoid, produced by the zona fasciculata of the adrenal gland. Cortisol is released in response to stress and a low level of blood glucocorticoids.<br>References Vigore, L., et al.: Cancer Ther., 6, 699 (2008), Puurunen, J., et al.: J. Clin. Endocrinol. Metab., 94, 1973 (2009), Lemos, D., et al.: J. Endocrinol., 201, 275 (2009), Chen, S., et al.: Am. J. Physiol., 296 (2009),<br></p>

<p>Applications An antitumor drug. An aromatase inhibitor.<br>References Brodie, A.M. and Njar, V.C.: Steroids, 65, 171 (2000), Lonning, P.E., et al.: J. Steroid Biochem, 77, 39 (2001)<br></p>

<p>Applications Labelled (3α)-Allopregnanolone. (3α)-Allopregnanolone acts as a GABAA receptor positive allosteric modulator. (3α)-Allopregnanolone is a metabolite of Progesterone (P755900). (3α)-Allopregnanolone is a neuroactive steroid present in the blood and also the brain.<br>References Puja, G. et al.: Neuron, 4, 759 (1990); Belelli, D. et ael. Neurosteroid, 6, 565 (2006); Viapiano, M. et al.: Neurochem. Res., 23, 155 (1998);<br></p>

<p>Applications Labelled Isoflupredone (I816600). Anti-inflammatory.<br>References Buchwald, P., et al.: Steroids, 73, 193 (2008), Holbeck, S., et al.: Mol. Endocrinol., 24, 1287 (2010),<br></p>

<p>Applications Testosterone Isocaproate, is one of the common anabolic steroid esters. It is a controlled substance in US due to their potential for abuse and misuse. It can be used for the treatment of constitutional delayed puberty (CDP), in combination of other testosterone esters.<br>References Noggie, F. T., et al.: J. Chromatography. Sci., 28 (5), 263 (1990); Buyukgebiz, A., et al.: Hormone REs., 44 Suppl 3, 32 (1995);<br></p>

<p>Applications Nandrolone (N315000(P)) derivative, which is an anabolic steroid.<br>References Poujol, N., et al.: J. Biol. Chem., 275, 24022 (2000), Roy, P., et al.: Steroid Biochem. Mol. Biol., 101, 68 (2006), Yin, D., et al.: J. Pharmacol. Exp. Ther., 304, 1323 (2003),<br></p>

<p>Stability Hygroscopic<br>Applications Deltamedrane is an impurity in the synthesis of Fluorometholone (F593145), a glucocorticoid; anti-inflammatory.<br>References Kupferman, A., et al.: Arch. Ophthlmol., 640, 100 (1982); Tokunaga H., et al.: Chem. Pharm. Bull., 32, 4012 (1984);<br></p>

<p>Applications Latanoprost Acid-d4 is the labeled analogue of Latanoprost Acid (L177310), a metabolite of Latanoprost. Latanoprost Acid (L177310) is a potent, selective FP prostanoid receptor agonist, a F-series Prostaglandin analog and is 200 times as potent as isopropyl ester form.<br>References Sjoquist, B., et al.: Drug Metab. Dispos., 26, 745 (1998), Watson, P., et al.: Drugs Today, 35, 449 (1999), Kashiwagi, K., et al.: Exp. Eye Res., 74, 41 (2002),<br></p>

<p>Stability Light Sensitive, Temperature Sensitive<br>Applications A metabolite of Vitamin D2 (V676040).<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 Barnes, P., et al.: J. Clin. Invest., 83, 1527 (1989), Holick, M., et al.: J. Cell Biochem., 88(2), 296 (2003), Maunsell, Z., et al.: Clin. Chem., 51, 1683 (2005),<br></p>

<p>Applications A labelled metabolite of Estradiol (E888000).<br>References Ball, P., et al.: Steroids, 33, 563 (1979), Wong, T., et al.: Clin. Chem., 38, 1830 (1992), Xu, X., et al.: J. Clin. Endocrinol. Metab., 84, 3914 (1999), Todorovic, R., et al.: Carcinogenesis, 22, 905 (2001), Travis, R., et al.: Breast Cancer Res., 5, 239 (2003),<br></p>

<p>Applications 17-epi-Testosterone-d3 is the labelled analog of 17-epi-Testosterone.Testosterone (T155000) and epitestosterone (T155005) 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 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 The 22S-metabolite of Cholesterol (C432501). 22-Hydroxycholesterol inhibits chemokine receptor activity.<br>References Samson, M., et al.: J. Biol. Chem., 272, 24934 (1997), Mackay, C., et al.: Nature Immunol., 2, 95 (2001), Navenot, J., et al.: J. Mol. Biol., 313, 1181 (2001),<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 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 2-Methoxyestrone is a endogenous estrogen metabolite. 2-Methoxyestrone detection can be used as a breast cancer biomarker and help assess the risk-factors for development of breast cancer.<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 Franke, A.A. et al.: Ana;. Bioanal. Chem., 401, 1319 (2011); Farlow, D.W. et al.: J. Chrom B Anal. Technol. Biomed Life Sci., 877, 1327 (2009);<br></p>

<p>Stability Light Sensitive<br>Applications Fluocinonide 22 Methyl Homologue is a steriod and a derivative compound of Fluocinolone Acetonide (F455800) with anti-inflammatory activity.<br>References Sammul, et al.: J. Assoc. Off. Agric. Chem., 47, 952 (1964), Emerson, M.V., et al.: BioDrugs, 21, 245 (2007),<br></p>

<p>Applications A labelled metabolite of Estradiol (E888000).<br>References Fishman, H.G, et al.: Biochemistry, 8, 4304 (1969), Ryan, Sugar, J., et al.: J. Clin. Endocrinol. Metab., 50, 137 (1980), Numazawa, M., et al.: Steroids, 38, 149 (1981), Travis, R., et al.: Breast Cancer Res., 5, 239 (2003),<br></p>

<p>Applications 6-Ketoprogesterone is used in the synthesis and biological evaluation of steroidal deivatives as selective inhibitors of AKR1B10. AKR1B10 is a promising anti-cancer therapeutic target.<br>References Zhang, W., et al.: Steroids, 86, 39 (2014)<br></p>

<p>Applications A metabolite of Estradiol.<br>References Bucala, R., et al.: J. Clin. Endocrinol. Metab., 60, 841 (1985), Telang, N., et al.: Anticancer Res., et al.: 11, 1021 (1991), Seeger, H., et al.: Med. Sci. Res., 26, 481 (1998), Bolton, J., et al.: Chem. Res. Toxicol., 13, 135 (2000),<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 Dienestrol is a metabolite of Diethylstilbestrol, a non-steroidal synthetic estrogen derivative.<br>References Liehr, J.G., et al.: Steroids, 40, 713 (1982); Yearley, E. et al.: J. Mol. Struct., 890, 240 (2008);<br></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>Soluble in Chloroform &amp; in Methanol Confirmed<br>Insoluble in Water</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>