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657394-99-5

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657394-99-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 657394-99-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,7,3,9 and 4 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 657394-99:
(8*6)+(7*5)+(6*7)+(5*3)+(4*9)+(3*4)+(2*9)+(1*9)=215
215 % 10 = 5
So 657394-99-5 is a valid CAS Registry Number.

657394-99-5Relevant articles and documents

Synthesis of heparin oligosaccharides and their interaction with eosinophil-derived neurotoxin

Hung, Shang-Cheng,Lu, Xin-An,Lee, Jinq-Chyi,Chang, Margaret Dah-Tsyr,Fang, Shun-Lung,Fan, Tan-Chi,Zulueta, Medel Manuel L.,Zhong, Yong-Qing

, p. 760 - 772 (2012/02/05)

A convenient route for the synthesis of heparin oligosaccharides involving regioselective protection of d-glucosamine and a concise preparation of rare l-ido sugars from diacetone α-d-glucose is described. Stereoselective coupling of a d-glucosamine-derived trichloroacetimidate with a 1,6-anhydro-β-l-idopyranosyl 4-alcohol gave the desired α-linked disaccharide, which was used as repeating unit for dual chain elongation and termination. Stepwise assembly from the reducing to the non-reducing end with a d-glucosamine-derived monosaccharide as starting unit furnished the oligosaccharide skeletons having different chain lengths. A series of functional group transformations afforded the expected heparin oligosaccharides with 3, 5 and 7 sugar units. Interaction of these oligosaccharides with eosinophil-derived neurotoxin (EDN), a cationic ribonuclease and a mediator produced by human eosinophils, was further investigated. The results revealed that at 5 μg mL-1, the heptasaccharide has sufficiently strong interference to block EDN binding to Beas-2B cells. The tri- and pentasaccharides have moderate inhibitory properties at 50 μg mL-1 concentration, but no inhibition has been observed at 10 μg mL-1. The IC50 values of the tri-, penta- and heptasaccharides are 69.4, 47.2 and 0.225 μg mL-1, respectively.

Synthesis of 48 disaccharide building blocks for the assembly of a heparin and heparan sulfate oligosaccharide library

Lu, Ng-Dai,Shie, Chi-Rung,Kulkarni, Suvarn S.,Pan, Guan-Rong,Lu, Xin-An,Hung, Shang-Cheng

, p. 5995 - 5998 (2007/10/03)

(Chemical Equation Presented) An efficient synthesis of the entire set of suitably protected 48 disaccharide building blocks for the assembly of a heparin and heparan sulfate oligosaccharide library is described here.

Biologically potent L-hexoses and 6-deoxy-L-hexoses: Their syntheses and applications

Kulkarni, Suvarn S.,Chi, Fa-Chen,Hung, Shang-Cheng

, p. 1193 - 1200 (2007/10/03)

This account describes our recent work in the development of new methodologies to prepare rare and biologically potent L-hexoses and 6-deoxy-L-hexoses, from cheapest D-glucose, via L-hexofuranoses and 1,6-anhydro-β-L-hexopyranoses as key building blocks. Their applications in the syntheses of heparin oligosaccharides, the carbohydrate moiety of bleomycin A2, and L-acovenose are also summarized here.

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