Steroid Standards

16α-Hydroxyestrone (Standard) is the analytical standard of 16α-Hydroxyestrone. This product is intended for research and analytical applications. 16α-Hydroxyestrone (16αOHE) is a major Estradiol metabolite. 16α-Hydroxyestrone (16αOHE) can be used for the research of metabolic disease.

7-Ketocholesterol (Standard) is the analytical standard of 7-Ketocholesterol. This product is intended for research and analytical applications. 7-Ketocholesterol is an oxidation product of cholesterol, widely present in atherosclerotic plaques, and has a stronger atherogenic effect than cholesterol. 7-Ketocholesterol can inhibit the rate-limiting enzymes involved in bile acid and cholesterol synthesis, such as cholesterol 7α-hydroxylase and HMG-CoA reductase. 7-Ketocholesterol exhibits pro-inflammatory effects both in vivo and in vitro and can induce cell apoptosis (apoptosis).

7β-Hydroxycholesterol (Standard) is the analytical standard of 7β-Hydroxycholesterol. This product is intended for research and analytical applications. 7β-Hydroxycholesterol is an oxysterol that derived by the oxidation of cholesterol. 7β-hydroxycholesterol can induce cellular oxidative stress, apoptosis, and necrosis, resulting in cytotoxicity. 7β-hydroxycholesterol has antitumor activity.

25-Hydroxycholesterol (Standard) is the analytical standard of 25-Hydroxycholesterol. This product is intended for research and analytical applications. 25-Hydroxycholesterol (25-OHC) is a metabolite of cholesterol that is produced and secreted by macrophages in response to Toll-like receptor (TLR) activation. 25-hydroxycholesterol is a potent (EC50≈65 nM) and selective suppressor of IgA production by B cells.

Tetrahydrocortisone (Standard) is the analytical standard of Tetrahydrocortisone. This product is intended for research and analytical applications. Tetrahydrocortisone is a stress-induced hormone. Tetrahydrocortisone is also a urinary metabolite of Cortisone derived from the reduction of Cortisone by 5-reductase.

21-Hydroxypregnenolone (Standard) is the analytical standard of 21-Hydroxypregnenolone (HY-113020). This product is intended for research and analytical applications. 21-Hydroxypregnenolone is a CYP17 inhibitor. 21-Hydroxypregnenolone competitively inhibits CYP17-mediated 17α-hydroxylation activity of progesterone, with a Ki value of 36.4 μM.

Pregnanediol (Standard) is the analytical standard of Pregnanediol. This product is intended for research and analytical applications. Pregnanediol is the major metabolite of progesterone and can be excreted via urine. Pregnanediol offers an indirect way to measure progesterone levels in vivo.

5α-Cholestan-3-one (Standard) is the analytical standard of 5α-Cholestan-3-one. This product is intended for research and analytical applications. 5α-Cholestan-3-one is an endogenous metabolite.

Cholesteryl acetate (Standard) is the analytical standard of Cholesteryl acetate. This product is intended for research and analytical applications. Cholesteryl acetate (Cholesterol 3-acetate) is a cholesterol ester.

Guggulsterone (Standard) is the analytical standard of Guggulsterone (HY-107738). This product is intended for research and analytical applications. Guggulsterone is a plant sterol derived from the gum resin of the tree Commiphora wightii. Guggulsterone inhibits the growth of a wide variety of tumor cells and induces apoptosis through down regulation of antiapoptotic gene products (IAP1, xIAP, Bfl-1/A1, Bcl-2, cFLIP and survivin), modulation of cell cycle proteins (cyclin D1 and c-Myc), activation of caspases and JNK, inhibition of Akt. Guggulsterone, a farnesoid X receptor (FXR) antagonist, with IC₅₀s of 24.06 μM and 39.05 μM for (-)-(E)-Guggulsterone (HY-N7781) and (Z)-Guggulsterone (HY-110066), respectively.

Smilagenin (Standard) is the analytical standard of Smilagenin. This product is intended for research and analytical applications. Smilagenin (SMI) is a small-molecule steroidal sapogenin from Anemarrhena asphodeloides and Pelargonium hortorum widely used in traditional Chinese medicine for treating chronic neurodegeneration diseases. Smilagenin (SMI) improves memory of aged rats by increasing the muscarinic receptor subtype 1 (M1)-receptor density. Smilagenin (SMI) attenuates Aβ(25-35)-induced neurodegenerationvia stimulating the gene expression of brain-derived neurotrophic factor, may represents a novel therapeutic strategy for AD.

Estramustine (Standard) is the analytical standard of Estramustine. This product is intended for research and analytical applications. Estramustine is an antineoplastic agent. Estramustine depolymerizes microtnbules by binding to tubulin 1, exhibits antimitotic activity with an IC50 value of ~16 μM for mitosis of DU 145 cells. Estramustine blocks cells at mitosis in prostate tumor xenografts.

Oxyphenbutazone (monohydrate) (Standard) is the analytical standard of Oxyphenbutazone (monohydrate). This product is intended for research and analytical applications. Oxyphenbutazone monohydrate is a Phenylbutazone (HY-B0230) metabolite, with anti-inflammatory effect. Oxyphenbutazone monohydrate is an orally active non-selective COX inhibitor. Oxyphenbutazone monohydrate selectively kills non-replicating Mycobaterium tuberculosis.

Yamogenin (Standard) is the analytical standard of Yamogenin. This product is intended for research and analytical applications. Yamogenin (Neodiosgenin) is a diastereomer of diosgenin. Yamogenin antagonizes the activation of the liver X receptor (LXR) in luciferase ligand assay. Yamogenin inhibits triacylglyceride (TG) accumulation through the suppression of gene expression of fatty acid synthesis in HepG2 hepatocytes. Yamogenin is a steroidal saponin that can be obtained from plant species with in vitro cytotoxicity, antioxidant, and antimicrobial properties. Yamogenin induces cell death via the extrinsic and intrinsic way of apoptosis. Yamogenin inhibits protein denaturation with an IC₅₀ of 1421.92 μg/mL. Yamogenin can be studied in research on gastric cancer.

Colocynthin (Standard) is the analytical standard of Colocynthin. This product is intended for research and analytical applications. Colocynthin is a cucurbitane triterpenoid glycoside that can be isolated from the bitter apple (Citrullus colocynthis).

Allylestrenol (Standard) is the analytical standard of Allylestrenol. This product is intended for research and analytical applications. Allylestrenol is an orally active synthetic anti-androgen sexualsteroid. Allylestrenol can prevent miscarriage in vivo. Allylestrenol significantly affects testosterone progesterone level in rat model. Allylestrenol can reduce ventral prostate weight in rat model.

Fluocortolone (Standard) is the analytical standard of Fluocortolone. This product is intended for research and analytical applications. Fluocortolone is an orally active anti-inflammatory agent that effectively reduces plasma fibrinogen levels. Fluocortolone inhibits Mycobacterium butyricum-induced foot edema in a rat model of adjuvanted joint inflammation (3-12 mg/kg).

16-Epiestriol (Standard) is the analytical standard of 16-Epiestriol (HY-130046). This product is intended for research and analytical applications. 16-Epiestriol (16-epi-Estriol; 16β,17β-Estriol) is a natural stereoisomer of estriol and an anti-inflammatory agent that targets UGT. The Ki values of 16-Epiestriol against human UGT1A10 and UGT2B7 are 98.1 μM and 162 μM, respectively. As a glucuronidation substrate, 16-Epiestriol can be modified at the 3-OH, 16-OH and 17-OH sites by various UGT enzymes; in liver microsomes, the modification mainly occurs at the 16-OH and 17-OH sites, while reactions take place at all three sites in intestinal microsomes. 16-Epiestriol acts on the phase II inflammatory process by blocking edema mediated by prostaglandins and leukocyte infiltration. It lacks glycogenic activity or any effect on blood glucose levels, and serves as an important candidate molecule in the research of inflammatory diseases.

(-)-Clerosterol (Standard) is the analytical standard of (-)-Clerosterol. This product is intended for research and analytical applications. (-)-Clerosterol is a natural product that can be isolated from Codium fragile.

Paramethasone Acetate (Standard) is the analytical standard of Paramethasone Acetate (HY-107939). This product is intended for research and analytical applications. Paramethasone Acetate is an orally active long-acting glucocorticoid. Paramethasone Acetate directly inhibits testicular aromatase, thereby reducing the synthesis of estradiol. Paramethasone Acetate suppresses the basal and midcycle luteinizing hormone surges in female animals and blocks estrogen synthesis. Paramethasone Acetate also decreases circulating levels of dihydrotestosterone, androstenedione and estradiol in male animals. Paramethasone Acetate inhibits cartilage degeneration and alleviates joint pathological damage in osteoarthritis models. Paramethasone Acetate can be used in research related to osteoarthritis and endocrinology.