Steroidi e Derivati

Impurity Dutasteride EP Impurity F
Applications 1-Chloro Dihydro Dutasteride (Dutateride EP Impurity F) is a 3-oxo-4-aza-5α-androstene-17β-carboxylic acid derivative and an impurity of Dutasteride (D735000).

Applications Labelled Budesonide, a non-halogenated glucocorticoid related to triamcinolone hexacetonide. Used as an antiinflammatory agent.
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),

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.
References Stoloff, G., et al.: PCT Int. Appl. WO 2016005599 A1 20160114 (2016)

Impurity Levonorgestrel EP Impurity D
Applications 13-Ethyl-18,19-dinor-17α-pregn-4-en-20-yn-17-ol (Levonorgestrel EP Impurity D) is an impurity of Levonorgestrel.
References McGinty, D., et al.: Endocrinology, 24, 829 (1939), Belanger, A., et al.: Steroids, 37, 361 (1981), Nieman, L., et al.: J. Clin. Endocrinol. Metab., 61, 536 (1985), Klebe, G., et al.: J. Med. Chem., 37, 4130 (1994),

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.
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),

Applications A synthetic progestin largely used in hormone therapy, on the central nervous system by studying two markers of the neuroendocrine function: the neurosteroid allopregnanolone and the opioid .beta.-endorphin. Progestogen.
References Bernardi, F., et al.: Eur. J. Endocrinol., 138, 316 (1998), Rupprecht, R., et al.: Steroids, 64, 83 (1999), Uzunova, V., et al.: Brain Res., 976, 1 (2003), Pluchino, N., et al.: J. Steroid Biochem. Mol. Biol., 102, 205 (2006),

Applications Triamcinolone Acetonide (T767165) impurity.

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

Applications (20S)-21-Hydroxy-20-methylpregn-4-en-3-one is a side chain degradation product of natural sterols. It is also an intermediate in the preparation of follicular fluid-meiosis activating sterol.
References Andor, A. et al.: Appl. Environ. Microbiol., 72, 6554 (2006); Blume, T. et al.: Org, Lett., 5, 1837 (2003);

Applications A derivative of Exemestane (E957000), a new aromatase inhibitor.
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),

Applications Obeticholic Acid Methyl Ester is a bile acid derivative useful in research.
References Pellicciari, R., et al.: Journal of Medicinal Chemistry, 50, 4265 (2007)

Impurity Latanoprost USP Related Compound D
Applications Latanoprost derivative. Latanoprost related compound D. Latanoprost USP Related Compound D.

Applications Anti-inflammatory (topical).
References Kirshbaum, J., et al.: Anal. Profiles Drug Subs., 8, 251 (1979),

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.
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),

Applications Norgestrel (N689500) impurity.
References Gorog, S., et al.: J. Chromatogr., 400 177 (1987),

Stability Moisture Sensitive
Applications (11β,16α)-9-Bromo-21-[(ethoxycarbonyl)oxy]-11-(formyloxy)-17-hydroxy-16-methylpregna-1,4-diene-3,20-dione is an impurity of Dexamethasone (D298800), a glucocorticoid used as an anti-inflammatory agent.
References Spangler, M., et al.: Chromatographia, 54(5/6), 329-334 (2001);Wershil, B.K., et al.: Int. Arch. Allergy Immunol., 107, 323 (1995)