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502495-32-1

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502495-32-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 502495-32-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,2,4,9 and 5 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 502495-32:
(8*5)+(7*0)+(6*2)+(5*4)+(4*9)+(3*5)+(2*3)+(1*2)=131
131 % 10 = 1
So 502495-32-1 is a valid CAS Registry Number.

502495-32-1Relevant articles and documents

Efficient convergent synthesis of 1alpha,25-dihydroxyvitamin D3 and its analogues by Suzuki-Miyaura coupling.

Hanazawa, Takeshi,Koyama, Akiko,Wada, Takeshi,Morishige, Eiko,Okamoto, Sentaro,Sato, Fumie

, p. 523 - 525 (2003)

[reaction: see text] 1alpha,25-Dihydroxyvitamin D(3) was synthesized by the Suzuki-Miyaura coupling of the A-ring intermediate 1, which was efficiently prepared from readily available 1,7-enyne 2, with the corresponding boronate compound of the C,D-ring portion. The method was applied to prepare des-C,D analogues of 1alpha,25-dihydroxyvitamin D(3).

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