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874210-29-4

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874210-29-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 874210-29-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,4,2,1 and 0 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 874210-29:
(8*8)+(7*7)+(6*4)+(5*2)+(4*1)+(3*0)+(2*2)+(1*9)=164
164 % 10 = 4
So 874210-29-4 is a valid CAS Registry Number.

874210-29-4Relevant articles and documents

Polyhydrazide-Based Organic Nanotubes as Efficient and Selective Artificial Iodide Channels

Aksimentiev, Aleksei,Chen, Feng,Joshi, Himanshu,Roy, Arundhati,Shen, Jie,Ye, Ruijuan,Zeng, Huaqiang

supporting information, p. 4806 - 4813 (2020/02/11)

Reported herein is a series of pore-containing polymeric nanotubes based on a hydrogen-bonded hydrazide backbone. Nanotubes of suitable lengths, possessing a hollow cavity of about a 6.5 ? diameter, mediate highly efficient transport of diverse types of anions, rather than cations, across lipid membranes. The reported polymer channel, having an average molecular weight of 18.2 kDa and 3.6 nm in helical height, exhibits the highest anion-transport activities for iodide (EC50=0.042 μm or 0.028 mol % relative to lipid), whcih is transported 10 times more efficiently than chlorides (EC50=0.47 μm). Notably, even in cholesterol-rich environment, iodide transport activity remains high with an EC50 of 0.37 μm. Molecular dynamics simulation studies confirm that the channel is highly selective for anions and that such anion selectivity arises from a positive electrostatic potential of the central lumen rendered by the interior-pointing methyl groups.

Synthesis of crescent aromatic oligoamides

Yuan, Lihua,Sanford, Adam R.,Feng, Wen,Zhang, Aimin,Zhu, Jin,Zeng, Huaqiang,Yamato, Kazuhiro,Li, Minfeng,Ferguson, Joseph S.,Gong, Bing

, p. 10660 - 10669 (2007/10/03)

This article describes the synthetic procedures for the preparation of crescent (and helical) aromatic oligoamides developed in recent years in our laboratory. The large-scale preparation of a variety of monomers derived from various tetrasubstituted benzenes is presented. Three different strategies for constructing various oligomers consisting of meta- and meta/para-linked benzene residues are discussed. Factors affecting coupling efficiency and yields are analyzed. The developed synthetic methods have provided the basis for the preparation of longer oligomers and for the development of solid-phase synthesis.

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