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239089-25-9

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239089-25-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 239089-25-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,9,0,8 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 239089-25:
(8*2)+(7*3)+(6*9)+(5*0)+(4*8)+(3*9)+(2*2)+(1*5)=159
159 % 10 = 9
So 239089-25-9 is a valid CAS Registry Number.

239089-25-9Relevant articles and documents

Synthetic studies on azadirachtin: Construction of the highly functionalized decalin moiety of azadirachtin

Ishihara, Jun,Yamamoto, Yuuko,Kanoh, Naoki,Murai, Akio

, p. 4387 - 4390 (1999)

Construction of the left segment of azadirachtin in naturally occurring enantiomer is described. The key reaction is an intramolecular Diels-Alder reaction, which was performed under thermal conditions to afford the highly functionalized decalin compounds selectively.

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