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205645-51-8

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205645-51-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 205645-51-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,6,4 and 5 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 205645-51:
(8*2)+(7*0)+(6*5)+(5*6)+(4*4)+(3*5)+(2*5)+(1*1)=118
118 % 10 = 8
So 205645-51-8 is a valid CAS Registry Number.

205645-51-8Downstream Products

205645-51-8Relevant articles and documents

Competition between (+)-catechin and (-)-epicatechin in acetaldehyde- induced polymerization of flavanols

Es-Safi, Nour-Eddine,Fulcrand, Helene,Cheynier, Veronique,Moutounet, Michel

, p. 2088 - 2095 (2007/10/03)

The reactions of (+)-catechin and (-)-epicatechin in the presence of acetaldehyde were studied in model solution systems. When incubated separately with acetaldehyde and at pH values varying from 2.2 to 4.0, reactions were faster with (-)-epicatechin than with (+)-catechin. In mixtures containing both (+)-catechin and (-)-epicatechin with acetaldehyde, new compounds besides the homogeneous bridged derivatives were detected. These compounds were concluded to be heterooligomers consisting of (+)- catechin and (-)-epicatechin linked with an ethyl bridge. In this case, the reaction of (-)-epicatechin was faster than that of (+)-catechin. This was also observed in solutions containing the two flavanols and the (+)-catechin- ethanol intermediate. Under these conditions, the homogeneous (+)-catechin bridged dimers and heterogeneous dimers were obtained by action of the intermediate on (+)-catechin and (-)-epicatechin, respectively. In addition, the homogeneous (-)-epicatechin ethyl-bridged dimers were also detected, showing that ethyl linkages underwent depolymerization and recombination reactions.

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