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20689-05-8

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20689-05-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20689-05-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,8 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 20689-05:
(7*2)+(6*0)+(5*6)+(4*8)+(3*9)+(2*0)+(1*5)=108
108 % 10 = 8
So 20689-05-8 is a valid CAS Registry Number.

20689-05-8Downstream Products

20689-05-8Relevant articles and documents

De novo Synthesis of Carbohydrates and Related Natural Products, 34 Synthesis of N-Acetyl-β-D-neuraminic Acid Derivatives via Inverse-Type Hetero-Diels-Alder Reaction

Haag-Zeino, Brigitte,Schmidt, Richard R.

, p. 1197 - 1203 (2007/10/02)

Inverse-type hetero-Diels-Alder reaction-based diastereoselective synthesis of 3-deoxy-2-glyculosonates is performed with the help of chiral carbon substituents in the 2-position of the 1-oxa-1,3-diene required as heterodiene.This is demonstrated for the

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