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131021-81-3

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131021-81-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131021-81-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,0,2 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 131021-81:
(8*1)+(7*3)+(6*1)+(5*0)+(4*2)+(3*1)+(2*8)+(1*1)=63
63 % 10 = 3
So 131021-81-3 is a valid CAS Registry Number.

131021-81-3Relevant articles and documents

Effects of Functional Groups and Sugar Composition of Quercetin Derivatives on Their Radical Scavenging Properties

Kato, Komei,Ninomiya, Masayuki,Tanaka, Kaori,Koketsu, Mamoru

, p. 1808 - 1814 (2016/08/02)

Quercetin derivatives are widespread in the plant kingdom and exhibit various biological actions. The aim of this study was to investigate the structure-activity relationships of quercetin derivatives, with a focus on the influence of functional groups and sugar composition on their antioxidant capacity. A series of quercetin derivatives were therefore prepared and assessed for their DPPH radical scavenging properties. Isoquercetin O-gallates were more potent radical scavengers than quercetin. The systematic analysis highlights the importance of the distribution of hydroxy substituents in isoquercetin O-gallates to their potency.

Phase-transfer-catalyzed synthesis of flavonoid glycosides

Demetzos, Costas,Skaltsounis, Alexios-Leandros,Tillequin, Francois,Koch, Michel

, p. 131 - 137 (2007/10/02)

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