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20-tert-butyldiphenylsilyloxy-3β-(2-tetrahydropyranyloxy)-21-nor-5-pregnene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

129270-40-2

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129270-40-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129270-40-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,2,7 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 129270-40:
(8*1)+(7*2)+(6*9)+(5*2)+(4*7)+(3*0)+(2*4)+(1*0)=122
122 % 10 = 2
So 129270-40-2 is a valid CAS Registry Number.

129270-40-2Downstream Products

129270-40-2Relevant academic research and scientific papers

PREPARATION OF SELECTIVELY PROTECTED DERIVATIVES OF 21-NOR-5-PREGNENE-3β,20-DIOL

Pouzar, Vladimir,Sames, Dalibor,Havel, Miroslav

, p. 499 - 511 (2007/10/02)

The preparation of selectively protected derivatives of the title diol (III) is described.Derivatives with protected hydroxyl in position 3 (IV, V and VI) were obtained by p-toluenesulfonic acid-catalyzed reaction of etienic acid (I) with dihydropyran, et

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