Steroids and Derivatives

<p>Applications Dexamethasone Acetate Impurity E is a pregn-4-ene derivative used in the preparation of antiallergic and antiinflammatory drugs.<br>References Nedelec, L., et al.: Ger. Offen. (1978)<br></p>

<p>Applications A labelled glucocorticoid microemulsion nasal preparation allergy inhibitor rhinitis.<br>References ukuoka, E., et al.: Chem. Pharm. Bull., 35, 2943 (1987), Schmitt, E., et al.: J. Pharm. Sci., 88, 291 (1999), Hancock, B., et al.: Pharm. Res., 17, 397 (2000), Hogan, S., et al.: Pharm. Res., 18, 112 (2001).<br></p>

<p>Applications Labelled Cortisol-d4 21-Sulfate (C696320). Cortisol 21-Sulfate is a phase II metabolite of Cortisol (H714615).<br>References Spielgelhalder, B., et al.: J. Steroid Biochem., 7, 749 (1976), Vanluchene, E., et al.: J. Chromatogr., 456, 175 (1988), Choi, M., et al.: Steroids, 65, 54 (2000),<br></p>

<p>Impurity Latanoprost USP Related Compound D<br>Applications Latanoprost derivative. Latanoprost related compound D. Latanoprost USP Related Compound D.<br></p>

<p>Applications Testosterone 17-Decanoate-d3, is the labeled analogue of Testosterone 17-Decanoate (T155120), an ester of Testosterone (T155000). Testosterone 17-Decanoate, can be used as a potential long-acting male contraceptive, with the combination of subcutaneous etonogestrel implants.<br>References Brady, B. M., et al.: Human Reproduction, 21 (1), 285 (2006); Themmen, A., et al.: Endocr. Rev. 21, 551 (2000);<br></p>

<p>Applications 3-Aminobenzotrifluoride is a known human toxin that can cause bacterial mutation and hepatocyte unscheduled DNA 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>References Reinhold, D., et al.: T. ASAE, 49, 2077 (2006); Thompson, C., et al.: Environ. Mutagen., 5, 803 (1983)<br></p>

<p>(1β,2β,6β-7α)-17-(Acetyloxy)-6-chloro-1,2-dihydro-7-hydroxy<br>-3'H-cyclopropa[1,2]pregna-1,4-diene-3,20-dione; 6β-Chloro<br>-1β,2β-dihydro-7α,17-dihydroxy-3'Hcyclopropa[1,2]pregna-1,4-diene-3,20-dione 17-Acetate;<br>Cyproterone Acetate EP Impurity G</p>

<p>Applications (11β)-9-Fluoro-11,21-dihydroxy-16-methyl-pregna-1,4,16-triene-3,20-dione is a derivative of Dexamethasone (D298800), an anti-inflammatory glucocorticoid.<br>References Kodelja, V., et al.: J. Immunol., 160, 1411 (1998), Metselaar, J., et al.: Arthritis Rheum., 48, 2059 (2003), Buttgereit, F., et al.: Arthritis Rheum., 50, 3408 (2004), Martinez, F., et al.: Front Biosci., 13, 453 (2008),<br></p>

<p>Applications 21-Butyryloxy Budesonide is a derivative of Budesonide (B689490), a non-halogenated glucocorticoid related to triamcinolone hexacetonide.<br>References Ryrfeldt., A., et a.: J. Steroid Biochem., 10, 317 (1979); Roth, G., et al.: J. Pharm. Sci., 69, 766 (1980); Clissold, S.P., et al.: Drugs, 28, 485 (1984)<br></p>

<p>Stability Hygroscopic<br>Applications 6α-9-Difluoroprednisolone-17-Carboxylate is an impurity of 6α,9α-Difluoroprednisolone (D446290), shown to increase metastases and increase glucocorticoid activity in C57/BL6 mice.<br>References Albert, D., Zeidman, I.: Cancer Res., 22, 1297 (1962)<br></p>

<p>Applications 17-Hydroxypregn-5-ene-3,20-dione is used in the synthesis of physiologically active steroid esters and spirolactones that functions as potential aldosterone antagonists.<br>References Seletskii, B. M., et al.: Croat. Chem. Acta. , 58, 699 (1986)<br></p>

<p>Stability Not stable in Acidic or basic condition<br>Applications 6β-Methyl Fluorometholone 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 Testosterone-16,16,17-d3 17-Phenylpropionate, is the labeled analogue of Testosterone 17-Phenylpropionate (T155150), a Testosterone ester being misused by athletes in an attempt to improve sports performance. It can also be used as a therapy in glucocorticoid-treated patients to increase the circulating testosterone concentration.<br>References Shackleton, C. H. L., et al.: Steroids, 62 (7), 523 (1997); Reid, I. R., et al.: Archives Internal Med., 156 (11), 1173 (1996);<br></p>

<p>Applications Betamethasone 21-Acetate-d3, is the labeled analogue of Betamethasone 21-Acetate (B327025), which is 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 N-Des(1,1-dimethylethyl) N-Cyclohexyl Finasteride is an impurity of Finasteride (F342000); an inhibitor of 5α-reductase which is the enzyme that converts testosterone to the more potent androgen 5α-dihydrotestosterone.Also an antialopecia agent.<br>References Koronkowski, M.J., et al.: Pharmacotherapy, 13, 309 (1993); Tenover, J.L., et al.: Clin. Ther., 19, 243 (1997); McConnell, J.D., et al.: N. Engl. J. Med., 338, 557 (1998)<br></p>

<p>Applications 4’-Nitro-3’-(trifluoromethyl)acetanilide is a metabolite of the nonsteroidal antiandrogen drug, Flutamide (F598850).<br>References Kang, P. et al.: Drug Metab. Dispos., 36, 1425 (2008); Takashima, E. et al.: Biol. Pharmac. Bull., 26, 1455 (2003); Katchen, B. et al.: J. Invest. Dermatol., 66, 379 (1976);<br></p>

<p>Applications Protected Estradiol. Drinking water contaminant candidate list 3 (CCL 3) compound as per United States Environmental Protection Agency (EPA), environmental, and food contaminants.<br>References Miilunpohja, M., et al.: J. Steroid Biochem. Mol. Biol., 100, 59 (2006), Ikonomou, M., et al.: Environ. Toxicol. Chem., 27, 243 (2008),<br></p>

<p>Applications An impurity of Finasteride (F342000).<br></p>

<p>Applications Vitamin D3 (V676045) analog.<br>References Roy, A., et al.: Steroids, 60, 530 (1995);<br></p>

<p>Applications A steroid produced by females having pheromone activities.<br>References Kotiyan, P., et al.: J. Pharm. Biomed. Anal., 22, 667 (2000), Bensafi, M., et al.: Behaviour. Brain Res., 152, 11 (2004), Zhu, B., et al.: Endocrinol., 147, 4132 (2006), Bellavance, E., et al.: J. Med. Chem., 52, 7488 (2009),<br></p>

<p>Applications 4-Methylestrone is an intermediate in the synthesis of 4-substituted estrone and estradiol derivatives with inhibitory activities towards steroid sulfatase as a target for therapeutic intervention of treating breast cancer.<br>References Numazawa, M., et al.: J. Steroid. Biochem. Molec. Biol., 96, 51 (2005);<br></p>

<p>Impurity Clobetasol Propionate EP Impurity I<br>Stability Hygroscopic<br>Applications Betamethasone 17-Propionate 21-Mesylate (Clobetasol Propionate EP Impurity I) is the 21-mesylate analogue of Betamethasone 17-Acetate (B327015) with antiinflammatory activity.<br>References Mitsukuchi, M. et al.: Chem. Pharm. Bull., 37, 3286 (1989);<br></p>

<p>Applications 6-keto Dexamethasone, is an impurity of Dexamethasone, 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></p>

<p>Applications A derivative of Exemestane (E957000), a new aromatase inhibitor.<br>References Thompson, E., et al.: J. Biol. Chem., 249, 5364 (1974), Cole, P., et al.: J. Med. Chem., 33, 2933 (1990), Buzzetti, F., et al.: Steroids, 58, 527 (1993),<br></p>

<p>Applications 15-Keto Latanoprost is a metabolite of Latanoprost (L177280).<br>References Sjoquist, B., et al.: Drug Metab. Dispos., 26, 745 (1998), Watson, P., et al.: Drugs Today, 35, 449 (1999),<br></p>

<p>Stability Hygroscopic<br>Applications α-Epoxyabiraterone Acetate is an impurity of Abiraterone (A108490), a steroidal cytochrome P 450 17α-hydroxylase-17,20-lyase inhibitor (CYP17), is currently undergoing phase II clinical trials as a potential drug for the treatment of androgen-dependent prostate cancer.<br>References Denis, L., et al.: Cancer, 72, 3888 (1993); Potter, G.A., et al.: J. Med. Chem., 38, 2463 (1995); Denmeade, S., et al.: Nat. Rev., 2, 389(2002); Scher, H., et al.: J. Clin. Oncol., 23, 8253 (2005)<br></p>

<p>Stability Hygroscopic<br>Applications Tixocortol is an anti-inflammatory agent. Tixocortol is used in fluorescent chemoaffinity labeling.<br>References Torossian, D.R., et al.: Arzneim.-Forsch., 31, 453 (1981),<br></p>

<p>Applications D-Homoanalog of Triamcinolone is a rearrangement product of the drug triamcinolone, an anti-inflammatory drug.<br>References Delaney, E. J.; et al.: Steroids, 59, 196 (1994)<br></p>

<p>Applications A Dexamethasone Dipropionate metabolite.<br>References Miyachi, Y., et al.: Steroids, 52, 137 (1988), Soh H., et al.: Brit. J. dermatol., 125, 73 (1991), Civiale, C., et al.: J. Ocul. Pharmacol., Thera., 20, 75 (2004),<br></p>

<p>Applications 20β-Dihydrocortisone 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. Its primary functions are to increase blood sugar through gluconeogenesis; suppress the immune system; and aid in fat, protein and carbohydrate metabolism.<br>References Reach, G., et. al.: Steroids, 30, 621 (1977); 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 A progestogen with low androgenic potency.<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 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 Progesterone (P755900) impurity.<br>References Liang, T., et al.: Biol. Chem., 256, 7998 (1981), Bratoeff, E., et al.: J. Steroid Biochem. Mol. Biol., 111, 275 (2008),<br></p>

<p>Applications 17α-Hydroxy-progesterone Valerate acts as a synthetic Progesterone (P755900) reducing the chance of pre-term birth in women. Progesterone is a steroid hormone produced by the corpus luteum. Induces maturation and secretory activity of the uterine endothelium; suppresses ovulation<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 Cholesterol 5alpha,6alpha-epoxide is used in the generation of oxysterols and in the studies of the biological significance of oxysterols.<br>References Lizard, G., et al.: Eur. J. Lipid Sci. Technol., 118, 135 (2016); Sabolova, M., et al.: J. Sci. Food Agric., 97, 5092 (2017); Bezine, M., et al.: Biochimie (2018)<br></p>

<p>Applications Cortisol derivative. A potential corticoid metabolite.<br>References Okihara, R. et al.; Chem. Pharm. Bull. 58, 344 (2010); Hosoda, H. et al.; Chem. Pharm. Bull. 32, 4023 (1984)<br></p>

<p>Stability Hygroscopic<br>Applications Prednisolone 21-Sulfate is a metabolite of Prednisolone (P703740).<br>References Hutzler, J., ET AL.: Drug Metab. Dispos., 30, 355 (2002), Sugiyama, D., et al.: J. Biol. Chem., 278, 43489 (2003), Hagenbuch, B., et al.: Xenobiotica, 38, 778 (2008),<br></p>

<p>Applications 17α,21-Dideoxy-6α,​9α-Difluoroprednisolone is an impurity of the drug Difluprednate (D445925). Difluprednate is a corticosteroid (derivative of prednisolone), approved for the treatment of post-operative ocular inflammation.<br>References Kapp, A., et al.: J. Allergy and Clin. Immunol., 110, 277 (2002); Yasueda, S., et al.: J. Pharm. Biomed. Anal., 30, 1735 (2003); Yamaguchi, M., et al.: Int. J. Pharm., 301, 121 (2005)<br></p>

<p>Applications α,α,α-Trifluorotoluene, is used as a specialty solvent in organic synthesis and an intermediate in the production of pesticides and pharmaceuticals.<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 Skelly, P. D., et al.: Handbook for Critical Cleaning, 1, 191 (2011);<br></p>

<p>Applications A metabolite of Etiocholanolone.<br>References Eriksson, H., et al.: Eur. J. Biochem., 15, 132 (1970), Cook, D., et al.: Endocrinology, 93, 1019 (1973),<br></p>

<p>Applications 17α-Hydroxyprogesterone Heptanoate can be used in therapeutic use and biological study of pharmaceutical compounds and methods of use thereof for treating gender-biased immune disorders.<br>References Stoloff, G., et al.: PCT Int. Appl. WO 2016005599 A1 20160114 (2016)<br></p>

<p>Applications Fulvestrant 17-Ketone, is an impurity of Fulvestrant (F862500), a novel steroidal estrogen antagonist reported to lack any partial agonist activity. Antineoplastic (hormonal).<br>References Wakeling, A.E., et al.: Cancer Res., 51, 3867 (1991), Howell, A., et al.: Br. J. Cancer, 74, 300 (1996), Robertson, J.F., et al.: Cancer Res., 61, 6739 (2001),<br></p>

<p>Stability Light Sensitive, Temperature Sensitive<br>Applications The epimer metabolite of Calcifediol or 25-hydroxyvitamin D3 (C125700).<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 Sakaki, T., et al.: Eur. J. Biochem., 267, 6158 (2000), Kamao, M., et al.: J. Biol. Chem., 278, 1463 (2003),<br></p>

<p>Stability Light Sensitive, Temperature Sensitive<br>Applications An Atorvastatin (A791750) derivative which have improved stability.<br></p>

<p>Applications Epoxy Metradiene is an impurity from 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>Impurity Progesterone EP Impurity E<br>Applications 20-Dihydroprogesterone Acetate (Progesterone EP Impurity E) is an analogue of Progesterone (P755900), a steroid used in cardiovascular and menopausal studies.<br>References Grodstein, F. et al.: New. Eng. J. Med., 335, 453 (1996); Cushman, M. et al.: Circulation, 100, 717 (1999);<br></p>

<p>Applications A potential metabolite of Exemestane (E957000).<br>References Buzzetti, F., et al.: Steroids, 58, 527 (1993),<br></p>

<p>Stability Hygroscopic<br>Applications A degradation product of Betamethasone (B327000).<br>References Andersson, P., et al.: J. Pharm. Pharmacol., 36, 763 (1984), Wurthwein, G., et al.: Biopharm. Drug Dispos., 11, 381 (1990), Samtani, M., et al.: J. Pharm. Sci., 93, 726 (2004), Samtani, M., et al.: Drug Metab. Dispos., 33, 1124 (2005),<br></p>

<p>Applications Atorvastatin-d5 tert-Butyl Ester is the labeled analogue of Atorvastatin tert-Butyl Ester (A791740), an impurity arising in the synthesis of Atorvastatin (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 1,2-Dihydro Triamcinolone is a derivative of Triamcinolone (T767165), a glucocorticoid, antiasthmatic (inhalant); antiallergic (nasal).<br>References Florey, K., et al.: Anal. Profiles Drug Subs., 1, 397 (1972); Bernstein, I.L., et al.: Chest, 81, 20 (1982);<br></p>

<p>Applications Dexamethasone Oxetanone is a potent antiglucocorticoid.<br>References Lamontagne, N., et al.: Endocrinology, 114, 2252 (1984);<br></p>

<p>Applications Glucocorticoid.<br></p>

<p>Applications 16α-Hydroxypregna-4,9(11)-diene-3,20-dione is an intermediate in the synthesis of 16-Hydroxycorticosterone 20-Hydroxy-21-Acid (H918430), an oxidized derivative of corticosterone (C695700).<br>References Allen, G.R., et al.: J. Am. Chem. Soc., 81, 4968 (1959);<br></p>

<p>Applications A corticosteroid prodrug for the treatment of eye disorders.<br>References Benameur, H., et al.: J. Pharm. Pharmacol., 47, 812 (1995), Tauchi, Y., et al.: Biol. Pharm. Bull., 24, 925 (2001), Chono, S., et al.: J. Drug Targeting, 13, 407 (2005),<br></p>

<p>Applications Labelled Testosterone (T155000). 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.Controlled substance (anabolic steroid). Androgen.<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 (16α)-21-[(Ethoxycarbonyl)oxy]-17-hydroxy-16-methylpregna-1,4,9(11)-triene-3,20-dione is an impurity of Dexamethasone (D298800), a glucocorticoid used as an anti-inflammatory agent.<br>References Spangler, M., et al.: Chromatographia, 54(5/6), 329-334 (2001);Wershil, B.K., et al.: Int. Arch. Allergy Immunol., 107, 323 (1995)<br></p>

<p>Applications Labelled 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>Impurity Atorvastatin 2-Hydroxy Lactone<br>Stability Hygroscopic<br>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></p>

<p>Applications Mestranol (M258755) derivative. It is used as contraceptive.<br>References Cullen, L.F., et al.: J. Pharma. Sci., 57, 1857 (1968),<br></p>

<p>Applications A metabolite of Cholesterol. It is formed from Cholesterol by the drug-metabolizing enzyme cytochrome P 450 3A4. A potential ligand for the nuclear receptor LXR and also a new endogenous CYP3A marker.<br>References Breuer, O., et al.: J. Lipid Res., 36, 2275 (1995), Pikuleva, I., et al.: J. Biol. Chem., 273, 18153 (1998), Chawla, A., et al.: Science, 294, 1866 (2001), Bodin, K., et al.: J. Biol. Chem., 276, 38685 (2001),<br></p>

<p>Impurity Ethinylestradiol EP Impurity M<br>Applications 2-Methylethynylestradiol (Ethinylestradiol EP Impurity M) is a 17α-ethynyl steroid. 2-Methylethynylestradiol is an impurity of Ethynylestradiol (E685100).<br></p>

<p>Applications 2,5-Bis(trifluoromethyl)aniline is a haloalkul substituted aniline used in the preparation of anti-benign prostatic hyperplasia drug, Dutasteride (D735000).<br>References Liang, Y. et al.: Jil. Dax. Xueb. Lixeub., 45, 1035 (2007);<br></p>

<p>Applications 25-Hydroxy Cholesterol-d6, is the labeled analogue of 25-Hydroxy Cholesterol (H918030), which is an oxygenated derivative of Cholesterol (C432501); an oxysterol. An inhibitor of human immunodeficiency virus replication in vitro. It also induces apoptosis in human monocytic cell lines as well as inducing apoptosis in CEM cells associated with negative regulation of c-Myc.<br>References Aupeix, K. et al.: Immunobiology, 194, 415 (1995); Moog, C. et al.: Antivir. Chem, Chemother., 9, 491 (1998); Ayala-Torres, S. et al.: Exp. Cell Res., 246, 193 (1999);<br></p>

<p>Applications Estrone-2,4-d2 (CAS# 350820-16-5) is a useful isotopically labeled research compound.<br></p>

<p>Applications A labelled 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 Labelled Dutasteride (D735000). 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 (2Z)-2,3-Dehydroxy Atorvastatin is an intermediate in synthesizing (2E)-2,3-Dehydroxy Atorvastatin (D230045), which is an impurity in the synthesis of Atorvastatin (A791750).<br>References Kearney, A.S., et al.: Pharm. Res., 10, 1461 (1993); Heinonen, T.M., et al.: Clin. Ther., 18, 853 (1996);<br></p>

<p>Applications Progesterone (P755900) impurity.<br>References Liang, T., et al.: Biol. Chem., 256, 7998 (1981), Bratoeff, E., et al.: J. Steroid Biochem. Mol. Biol., 111, 275 (2008),<br></p>

<p>Applications 3β,5α-Tetrahydrodeoxycorticosterone is a novel derivative of the steroid Dehydroepiandrosterone (DHEA), a known uncompetitive inhibitor of Glucose 6-Phosphate Dehydrogenase (G6PD). Studies have shown that 3β,5α-Tetrahydrodeoxycorticosterone may have potential function in the modulation of calcium and GABAA-gated chloride channel currents found in rat and guinea-pig neurons.<br>References Hamilton, N.M., et al.: J. Medn. Chem., 55, 4431 (2012); Ffench, M., et al.: Steriods., 64, 76 (1999);<br></p>

<p>Atorvastatin is a potent inhibitor of the enzyme HMG-CoA reductase, which is responsible for the conversion of HMG-CoA to mevalonate. This inhibition reduces the production of cholesterol and other lipids in the liver. Metabolism studies have shown that atorvastatin undergoes extensive presystemic metabolism by cytochrome P450 enzymes, primarily CYP3A4 and CYP2C9. The drug is converted to inactive metabolites that are eliminated primarily through renal excretion. Atorvastatin has not been found to inhibit any of the following: cytochrome P450 1A1/2, 2C8/9, 2D6, 2E1, 3A4/5 or glucuronidases.</p>

<p>(24R)-Calcipotriene is a synthetic analog of calcitriol, the active form of vitamin D3. It is a proapoptotic agent that inhibits tumor growth by causing mitochondrial membrane potential collapse in cancer cells. (24R)-Calcipotriene has been shown to inhibit tumor growth in animals and human cells in vitro. This drug also potentiates the effects of other anticancer drugs such as doxorubicin and etoposide. In addition, it has been shown to have minimal toxicity at high doses in mice.</p>

<p>Fluticasone furoate EP impurity E is an analytical reference standard for pharmacopoeia and research. It is a synthetic fluticasone furoate EP impurity that has been custom synthesized for use as a high-purity, HPLC-grade standard. Fluticasone furoate EP impurity E is characterized by its natural origin and purity, making it appropriate for use in drug development and research. The CAS number for this product is 398454-97-2.</p>