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57-91-0 Good Supplier In China 17α-estradiol on hot selling Pharmaceutical grade 17α-estradiol
α-Estradiol is an endogenous ligand for estrogen receptors ERα (Ki = 0.2 nM) and ERβ (Ki = 1.2 nM). Studies indicate that α-Estradiol is a short acting estrogen which only forms complexes with estrogen ligand receptors for a short period of time. These studies suggest that α-estradiol is beneficial in studying the affects caused by the MAPK signaling cascade such as cell division, neuronal differentiation, and neuronal survival in the developing brain. Furthermore, α-estradiol inhibits the influx of calcium in human aortic smooth muscle cells.
17alpha-estradiol is an estradiol that is estra-1,3,5(10)-triene substituted by hydroxy groups at positions 3 and 17 (the 17alpha stereoisomer). It is a 17alpha-hydroxy steroid, a 3-hydroxy steroid and an estradiol.
17α-Estradiol is the natural optical isomer of 17β-estradiol, the major estrogen secreted by the premenopausal ovary. 17α-Estradiol is a less active isomer than its counterpart, displaying 100-fold lower estrogenic activity relative to 17β-estradiol. It can inhibit 5α-reductase, which plays a role in regulating hair growth. 17α -estradiol is reported to activate the MAPK/ERK and PI3K-Akt signaling pathways via activation of the estrogen receptor-X and has been shown to be neuroprotective after an ischemic stroke and oxidative stress and in transgenic mice with Alzheimer’s disease.
Catalogue Number | E887995 |
Chemical Name | 17α-Estradiol |
Synonyms | (17α)-Estra-1,3,5(10)-triene-3,17-diol; 1,3,5-Estratriene-3,17α-diol; 13β-Methyl-1,3,5(10)-gonatriene-3,17α-diol; 17-Epiestradiol; 17α-Oestradiol; 3,17-Dihydroxyestratriene; 3,17α-Dihydroxyoestra-1,3,5(10)-triene; Alfatradiol; Epiestrol; Estra-1,3,5(10)-triene-3,17α-diol; NSC 20293; α-Estradiol; Ethinyl Estradiol Impurity L (EP); Estradiol 17α-Hydroxy Impurity Estradiol EP Impurity B |
Impurity | Estradiol 17-Hydroxy Impurity; Estradiol EP Impurity B; Ethinylestradiol EP Impurity L |
CAS Number | 57-91-0 |
Molecular Formula | C??H??O? |
Appearance | White to Off-White Solid |
Melting Point | 210-219°C |
Molecular Weight | 272.38 |
Storage | Refrigerator |
Solubility | Dioxane (Slightly, Heated, Sonicated), Methanol (Slightly) |
Category | Standards; Steroids; Pharmaceutical/API Drug Impurities/Metabolites; |
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