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81713-49-7

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81713-49-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81713-49-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,1 and 3 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 81713-49:
(7*8)+(6*1)+(5*7)+(4*1)+(3*3)+(2*4)+(1*9)=127
127 % 10 = 7
So 81713-49-7 is a valid CAS Registry Number.

81713-49-7Downstream Products

81713-49-7Relevant articles and documents

Studies on Anhydro-osazones. Part 5. Structure and Anomeric Configuration of the C-Nucleoside Analogues Obtained from the Dehydration of D-gluco- and D-manno-Hept-2-ulose Phenylosazones

Sallam, Mohammed A. E.

, p. 557 - 562 (2007/10/02)

Dehydration of D-gluco- and D-manno-hept-2-ulose phenylosazones with methanolic sulphuric acid afforded the anomeric furanosyl anhydro-osazone pair: 3,6-anhydro-D-manno-hept-2-ulose phenylosazone (2) and the gluco-analogue osazone (3).A new type of anomeric pyranosyl anhydro-osazone was also idenified.Refluxing the anhydro-osazones with copper sulphate afforded the anomeric furanosyl C-nucleoside analogues 4-α-D-arabinofuranosyl-2-phenyl-v-triazole (6) and the β-isomer (7), and the arabinofuranosyl isomers (8) and (9).The structures and anomeric configurations of the products were determined by periodate oxidation, o.r.d., and n.m.r. spectroscopy.The mechanism of the dehydration and the mass spectra of compounds (6)-(9) are discussed.

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