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1026922-74-6

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1026922-74-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1026922-74-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,6,9,2 and 2 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1026922-74:
(9*1)+(8*0)+(7*2)+(6*6)+(5*9)+(4*2)+(3*2)+(2*7)+(1*4)=136
136 % 10 = 6
So 1026922-74-6 is a valid CAS Registry Number.

1026922-74-6Relevant articles and documents

18F-labeled octanoates as potential agents for cerebral fatty acid studies. The influence of 4-substitution and the fluorine position on biodistribution.

Nagatsugi,Inoue,Sasaki,Maeda

, p. 607 - 615 (2007/10/02)

In order to understand the structural features that might lead to an in vivo radiotracer for studying cerebral fatty acid metabolism, 8-[18F]fluorooctanoate derivatives with methyl or gem-dimethyl branching at the C4 position have been prepared. 3-[18F]Fluoro- and 4-[18F]fluorooctanoic acid have also been synthesized for studying the influence of the fluorine position on the in vivo behavior of 18F-labeled octanoic acid analogs. Radiochemical synthesis was achieved by the nucleophilic displacement of a tosylate or mesylate precursor with [18F]fluoride ion. Tissue distribution studies in rats showed low cerebral uptakes of these 18F-labeled fatty acid analogs with poor brain-to-blood ratios. 3-[18F]Fluorooctanoic acid showed considerable defluorination, evident as a high bone activity level. The initial uptake of activity in the brain after injection of ethyl 8-[18F]fluoro-4-methyloctanoate and 4-[18F]-fluorooctanoic acid remained virtually unchanged over an extended time period, similar to that previously observed for the unbranched analogs, ethyl 8-[18F]fluorooctanoate and its free acid. In contrast, the 4-gem-dimethyl branched analog was rapidly and preferentially taken up by the liver. It was shown in the metabolite analysis that labeled metabolites produced from 8-[18F]fluoro-4-methyloctanoic acid were found in blood, and that they could enter the brain to a significant degree. Thus, the present studies showed that radioactivity retention in the brain in the case of the 4-methyl branched analog was mainly attributable to its radioactive metabolites.

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