Ethynyl Estradiol

Cayman Chemical Item Number 10006486

Ethynyl 17β-Oestradiol; Ethynyl E2; Ethynyl 17β-Estradiol; Ethynyl β-Estradiol (CAS 57-63-6)

Ethynyl Estradiol (CAS 57-63-6)

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Description

Estrogens direct the development of the female genotype in embryogenesis and at puberty. Estradiol is the major estrogen secreted by the premenopausal ovary.1 Ethynyl estradiol is a synthetic analog of estradiol used commonly as an oral contraceptive, often in combination with a progestin such as norgestrel/levonorgestrel or desogestrel. Efficacy of oral administration of ethynyl estradiol is facilitated by the ethynyl substitution at the C-17 position, which inhibits first pass hepatic metabolism. Ethynyl estradiol is also rapidly and almost completely absorbed from the gastrointestinal tract.2

1 Gruber, C.J., Tschugguel, W., Schneeberger, C., et al. Production and actions of estrogens. N Engl J Med 346(5) 340-352 (2002).

2 Coelingh Bennink, H.J.T. Are all estrogens the same? Maturitas 47 269-275 (2003).

Synonyms
  • Ethynyl 17β-Oestradiol
  • Ethynyl E2
  • Ethynyl 17β-Estradiol
  • Ethynyl β-Estradiol
Formal Name 19-​norpregna-​1,​3,​5(10)-​trien-​20-​yne-​3,​17α-​diol
CAS Number 57-63-6
Molecular Formula C20H24O2
Formula Weight 296.4
Formulation A crystalline solid
Purity ≥98%
λmax 281 nm
Stability 2 years
Storage -20°C
Shipping Room temperature in continental US; may vary elsewhere
SMILES
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CCC1(O)​CCC2[C@@H]​3CCc4cc(O)​ccc4C3CC[C@]​12C
InCHI Code
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​1S/C20H24O2/c1-3-20(22)​11-9-18-17-6-4-13-12-14(21)​5-7-15(13)​16(17)​8-10-19(18,20)​2/h1,5,7,12,16-18,21-22H,4,6,8-11H2,2H3/t16-,17-,18+,19+,20+/m1/s1
InCHI Key
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BFPYWIDHMRZLRN-SLHNCBLASA-N

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Size Price Quantity Subtotal
100 mg $8.00 $0.00
500 mg $18.00 $0.00
1 g $48.00 $0.00
5 g $160.00 $0.00
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Cart Total $0.00

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Pricing updated 2014-04-16. Prices are subject to change without notice.

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