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19-nor-pregna-1,3,5(10)-trien-20-yne-3,17-diol, also known as 19-nor-5α-pregna-1,3,5(10)-trien-20-yne-3,17-diol, is a synthetic steroid with a unique structure. It is characterized by the absence of a carbon atom at the 19th position, which distinguishes it from other pregnane derivatives. 19-nor-pregna-1,3,5(10)-trien-20-yne-3,17-diol features a triple bond at the 20th position and a double bond at the 5th position, which contributes to its distinct chemical properties. The presence of hydroxyl groups at the 3rd and 17th carbon atoms further influences its reactivity and potential applications. This steroid is of interest in the field of medicinal chemistry, particularly for its potential therapeutic uses, although its specific applications and effects would require further research and clinical studies to determine.

1665-61-8

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1665-61-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1665-61-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,6 and 5 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1665-61:
(6*1)+(5*6)+(4*6)+(3*5)+(2*6)+(1*1)=88
88 % 10 = 8
So 1665-61-8 is a valid CAS Registry Number.

1665-61-8Upstream product

1665-61-8Downstream Products

1665-61-8Relevant academic research and scientific papers

17β-Ethynyl-3,17α-estradiol and derivatives thereof

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, (2008/06/13)

17β-ethynyl-3,17α-estradiol and derivatives thereof are prepared by epimerization of 17-acyl esters of 17α-ethynyl-3,17β-estradiol 3-ethers. 17α-ethynyl-3,17α-estradiol and its derivatives are active as post-coital antifertility agents and inhibit the growth of or reduce the size of the prostate gland and the seminal vesicle.

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