Steroids and Derivatives

<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>Hydrocortisone 21-Aldehyde (Hydrate</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>Calcipotriol EP Impurity E is a synthetic impurity that is found in the calcipotriol EP API. Calcipotriol EP Impurity E is an impurity standard for HPLC and can be used in drug development, research and development, and pharmacopoeia. It has been shown to have no significant effect on the pharmacological activity of calcipotriol EP.</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>Soluble in Chloroform &amp; in Methanol Confirmed<br>Insoluble in Wate</p>

<p>(betaS,deltaS)-2-(4-Fluorophenyl)-beta,delta-dihydroxy-5- (1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole- 1-heptanoic acid calcium salt (2:1) is a fluorinated derivative of the natural metabolite 2-(4-fluorophenyl)-beta,delta-dihydroxy -5-(1 methylethyl)-3 phenyl 4-[(phenylamino)carbonyl]-1H pyrrole 1 heptanoic acid. It is an enantiomer of the racemate with optical purity &gt; 98%. The compound has been used as a pharmacological and supramolecular chemistry probe for assays and chemosensors.</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>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>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>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>Soluble in Chloroform &amp; in Methanol Confirmed<br>Insoluble in Water</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>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>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>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>Orally active atorvastatin inhibits HMG-CoA reductase, lowers lipids, hinders SV-SMC cell growth, and can up thrombotic risk with clopidogrel.</p>

<p>Bexarotene (LGD1069) is a retinoid analogue that is used to treat the skin manifestations of cutaneous T cell lymphoma (CTCL).</p>

<p>Travoprost (Fluprostenol isopropyl ester) is used to treat glaucoma and ocular hypertension,is a potent and selective FP prostaglandin receptor agonist.</p>

<p>Applications A labelled metabolite of Budesonide (B689490), an antiinflammatory agent.<br>References Cserhati, T., et al.: J. Pharm. Biomed. Anal., 22, 25 (2000), Dilger, K., et al.: J. Clin. Pharmacol., 47, 1532 (2007), Buchwald, P., et al.: Steroids, 73, 193 (2008),<br></p>

<p>Applications 21-Carboxy Dexamethasone is a useful research chemical.<br>References Shepard, Allan R., ACS Chem. Biol., 3, 549-558(2013);<br></p>

<p>Applications Latanoprost Enol is an impurity of Latanoprost (L177280), a prostaglandin analogue used to treat glaucoma and other degenerative diseases of the eye.<br>References Resul, B., et al.: J. Med. Chem., 36, 2242 (1993);<br></p>

<p>Applications Estriol 16α,17β-Diacetate is a diacetate derivative of Estriol (E888960); an estrogenic metabolite considerably less potent than the hormone Estradiol (E888000).<br>References Marrian, et al.: Biochem. J., 23,1090 (1929); Huffman, et al.: J. Biol. Chem., 169, 167 (1947)<br></p>

<p>Applications ∆9,11-Dehydro-17α-cyanomethyl estradiol is a metabolite of progestin dienogest (D441870), and is currently being investigated for progesterone-receptor binding, progestational, antiprogestational, estrogenic and antigonadotropic activities for the inhibition of fertility. It is also being considered a novel treatment for heavy menstrual bleeding.<br>References Oettel, M., et al.: Pharmazie, 41, 627 (1993); Kiley, J. &amp; Shulman, L.: Int. J. Womens Health, 3, 281 (2011);<br></p>

<p>Impurity Levonorgestrel EP Impurity G<br>Applications 6α-Hydroxy Levonorgestrel (Levonorgestrel EP Impurity G) is a hydroxylated impurity of Norgestrel (N689500).<br>References Lin, Y., et al.: Biochim. Biophys. Acta, 218, 526 (1970), Smith, K., et al.: J. Steroid Biochem., 32, 445 (1989), Hu, S., et al.: Steroids, 60, 337 (1995),<br></p>

<p>Impurity Finasteride EP Impurity B<br>Applications 3-Oxo-4-aza-5α-αndrost-1-ene-17β-carboxylic Acid Methyl Ester (Finasteride EP Impurity B) is an impurity of Finasteride (F342000) and Dutasteride (D735000). An intermediate in the synthesis of Finasteride and Dutasteride, 5α-reductase inhibitors used for treatment of benign prostatic hyperplasia acne, seborrhea, female hirsutism, prostatitis, and prostatic carcinoma and other hyperandrogenetic related disorders. Finasteride impurity.<br>References Bakshi., et al.: J. Med. Chem., 38, 3189 (1995),<br></p>

<p>Applications An impurity of Atorvastatin.<br>References Graul, A., et al.: Drugs Fut. 22, 956 (1997),<br></p>

<p>Applications Exemestane-13C,D3 is the labeled analogue of Exemestane (E957000), an antineoplastic (hormonal).<br>References Giudici, D., et al.: J. Steroid Biochem., 30, 391 (1988), Evans, T.R.J., et al.: Cancer Res., 52, 5933 (1992), Zilembo, N., et al.: Brit. J. Cancer, 72, 1007 (1995)<br></p>

<p>Impurity Levonorgestrel EP Impurity C<br>Applications 13-Ethyl-3-ethynyl-18,19-dinor-17α-pregna-3,5-dien-20-yn-17-ol (Levonorgestrel EP Impurity C) is an impurity of Levonorgestrel.<br></p>

<p>Stability Temperature and Light Sensitive<br>Applications A metabolite of Vitamin D3.<br>References Bell, P.A., et al.: Biochem. J., et al.: 115, 663 (1969), Kumar, R.S., et al.: J. Clin. Invest., 65, 277 (1980), Shimada, K., et al.: Biol. Pharm. Bull., 19, 491 (1996),<br></p>

<p>Impurity Calcipotriol EP Impurity C<br>Stability Temperature Sensitive<br>Applications The trans-isomeric impurity of Calcipotriene (C144200) and a vitamin D3 analogue with antitumor effects.<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 Wietrzyk, J. et al.: Anti-Cancer Drugs, 18, 447 (2007); Wietrzyk, J. et al.: Anticancer Res., 27, 3387 (2007); Filip, B. et al.: J. Ster. Biochem. Mol. Biol., 121, 399 (2010);<br></p>

<p>Applications A labelled glucocorticoid microemulsion nasal preparation allergy inhibitor rhinitis.This compound is a mixture of diastereomers at the cyclohexyl acetal.<br>References Fukuoka, 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 Lasofoxifene intermediate.<br>References Rosati, R., et al.: J. Med. Chem., 41, 2928 (1998),<br></p>

<p>Applications (3aR,4R,5R,6aS)-4-Formyl-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl [1,1'-biphenyl]-4-carboxylate is an intermediate in the synthesis of Prostaglandin E2 (P838610), the most common and biologically potent of mammalian prostaglandins.<br>References Radeuchel, B., et al.: Tetrahedron. Lett., 633, 9 (1975);<br></p>

<p>Applications Estradiols ester used in polymeric matrix for transdermal treatment of osteoporosis.<br>References Tripathi, V.N., et al.: Can. J. Animal Sci., 48, 449 (1968),<br></p>

<p>Dexamethasone acetate treats rheumatic issues, skin conditions, asthma, allergies, COPD, brain swelling, croup, TB adjunct.</p>

<p>3-(N-Phenyl-N-methyl)aminoacrolein is a hydrophobic compound that has been shown to reversibly bind to serum albumin. This binding leads to a decrease in the lipid content of lipoproteins and a decrease in the rate of their metabolism. These effects are mediated by hydrophobic interactions with the hydrophobic regions of serum albumin. 3-(N-Phenyl-N-methyl)aminoacrolein also interacts with human serum albumin, which is involved in lipid transport and metabolism, and can be used as a contrast agent for X-ray diffraction studies.</p>

<p>Applications 4-Hydroxy Estradiol 1-N3-Adenine is an estrogen metabolite formed with DNA which can lead to the mutations that initiate breast, prostate, and other types of cancer. The N3Ade depurinating adducts could serve as biomarkers to predict the risk of breast cancer.<br>References Chakravarti, D., et al.: Mutat. Res., 456, 17 (2000), Liehr, J., et al.: Endocr. Rev., 21, 4054 (2000), Chakravarti, D., et al.: Oncogene, 20, 7945 (2001), Cavalieri, E., et al.: Chem. Res. Toxicol., 14, 1041 (2002),<br></p>