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- Ethisterone
-
- $35.00
-
2026-09-12
- CAS:434-03-7
- Purity: 99.50%
- Supply Ability: 10g
- Ethisterone
-
- $35.00
-
2026-07-27
- CAS:434-03-7
- Purity: 99.50%
- Supply Ability: 10g
- Ethisterone
-
- $1.50
-
2026-05-15
- CAS:434-03-7
- Min. Order: 1g
- Purity: 99.0% Min
- Supply Ability: 100 Tons
|
| | Ethisterone Basic information |
| Product Name: | Ethisterone | | Synonyms: | 4,17ALPHA-PREGNEN-17BETA-OL-20-YN-3-ONE;4,17a-pregnen-17b-ol-20-yn-3-one;4,17A-PREGNEN-17B-OL-20-YNE;4-ANDROSTEN-17-ALPHA-ETHYNYL-17-BETA-OL-3-ONE;(8R,9S,10R,13S,14S,17R)-17-ETHYNYL-17-HYDROXY-10,13-DIMETHYL-1,2,6,7,8,9,10,11,12,13,14,15,16,17-TETRADECAHYDRO-CYCLOPENTA[A]PHENANTHREN-3-ONE;ANHYDROHYDROXYPROGESTERONE;ANHYDROXYPROGESTERONE;17BETA-HYDROXY-4,17ALPHA-PREGNEN-20-YN-3-ONE | | CAS: | 434-03-7 | | MF: | C21H28O2 | | MW: | 312.45 | | EINECS: | 207-096-5 | | Product Categories: | Steroids;Acetylenes;Biochemistry;Functionalized Acetylenes;Hydroxyketosteroids;Intermediates & Fine Chemicals;Metabolites & Impurities;Inhibitors;progestogen estrogen;Metabolites & Impurities, Pharmaceuticals, Intermediates & Fine Chemicals;Steroid and Hormone;Pharmaceuticals | | Mol File: | 434-03-7.mol |  |
| | Ethisterone Chemical Properties |
| Melting point | 263-269 °C (lit.) | | Boiling point | 392.36°C (rough estimate) | | alpha | D23 +23.8° (dioxane); D25 -32.0° (pyridine) | | density | 1.0697 (rough estimate) | | refractive index | 33 ° (C=1, Pyridine) | | storage temp. | room temp | | solubility | Soluble to 0.05 mg/mL
(0.16 mM) in DMSO | | form | Solid | | pka | 13.10±0.60(Predicted) | | color | Light yellow to yellow | | biological source | synthetic (organic) | | Water Solubility | soluble in chloroform, DMSO (0.05 mg/ml), acetone (slightly ), ethanol (<1 mg/ml at 25°C), and water (<1 mg/ml at 25°C). | | Merck | 14,3741 | | BRN | 1889895 | | InChI | 1S/C21H28O2/c1-4-21(23)12-9-18-16-6-5-14-13-15(22)7-10-19(14,2)17(16)8-11-20(18,21)3/h1,13,16-18,23H,5-12H2,2-3H3/t16-,17+,18+,19+,20+,21+/m1/s1 | | InChIKey | CHNXZKVNWQUJIB-CEGNMAFCSA-N | | SMILES | C[C@]12CCC(=O)C=C1CC[C@@H]3[C@@H]2CC[C@@]4(C)[C@H]3CC[C@@]4(O)C#C | | CAS DataBase Reference | 434-03-7 | | NIST Chemistry Reference | Ethisterone(434-03-7) |
| Hazard Codes | Xn,T | | Risk Statements | 40-48-61 | | Safety Statements | 22-24/25-45-53 | | RIDADR | UN 2811 | | WGK Germany | 3 | | RTECS | TU5570250 | | HS Code | 29372390 | | Storage Class | 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects | | Hazard Classifications | Aquatic Acute 1
Aquatic Chronic 1
Repr. 1A |
| | Ethisterone Usage And Synthesis |
| Description | Ethisterone is an orally bioavailable synthetic progestin and a derivative of testosterone (Item Nos. ISO60154 | 15645) that binds to progesterone and androgen receptors (EC50s = 23 and 23.1 nM, respectively, in yeast). Ethisterone (1 μM) downregulates progesterone receptors in MCF-7 cells. | | Chemical Properties | Off-White Powder | | Originator | Lutocyclin,Ciba | | Uses | Ethisterone has been used as a component in Dulbecco′s modified eagle medium (DMEM) to culture the transfected COS-7 cell for transient transfection assay andgene transfection assay. | | Uses | Synthetic progestogen; metabolite of Danazol; intermediate in the synthesis of Spironolactone | | Definition | ChEBI: A 17beta-hydroxy steroid that is testosterone in which the 17beta hydrogen is replaced by an ethynyl group. Ethisterone was the first orally active progestin and is a metabolite of danazol. | | Manufacturing Process | 0.5 part of δ5:6-17-ethinyl-androstendiol-(3:17) is dissolved in 10 parts of dry
acetone, the solution is mixed with a solution of 1 part of tertiary aluminum
butylate in 40 parts of absolute toluene and the whole is heated to boiling in a
reflux apparatus for 21 hours. After the reaction mixture has cooled it is
diluted with 100 parts of ether, the solution is washed with dilute mineral acid
and with water, dried and the solvent is evaporated. In this manner there is
obtained δ5:6-17-ethinyl-androstene-3-one-17-ol (ethisterone); MP: 270°-
272°C; it may be recrystallized from ethyl acetate. | | Therapeutic Function | Progestin | | General Description | Ethisterone is aprogestogen. It is a danazol derivative. | | Biochem/physiol Actions | Ethisterone acts as a progestational agent. It is consumed by pregnant mothers to prevent miscarriage. | | References | [1] L. MCROBB . Structure–activity relationships of synthetic progestins in a yeast-based in vitro androgen bioassay[J]. Journal of Steroid Biochemistry and Molecular Biology, 2008, 110 1: Pages 39-47. DOI: 10.1016/j.jsbmb.2007.10.008
[2] J.M. GLEDHILL . Progesterone receptor induction by danazol in cultured cancer cells and the rat uterus[J]. Journal of Steroid Biochemistry and Molecular Biology, 1992, 43 4: Pages 289-296. DOI: 10.1016/0960-0760(92)90163-d |
| | Ethisterone Preparation Products And Raw materials |
| Raw materials | Dehydroepiandrosterone-->Pregn-4-en-20-yn-3-one, 17-hydroxy--->Pregn-4-ene-3,20-dione, 21-bromo-17-hydroxy--->17α-Pregn-5-en-20-yne-3β,17-diol-->Reichstein's substance S 21-acetate-->3-Ethoxy-androsta-3,5-dien-17-one-->Androstenedione-->Acetylene | | Preparation Products | 17-ethyl-17-hydroxy-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one |
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