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138688-70-7

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138688-70-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138688-70-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,6,8 and 8 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 138688-70:
(8*1)+(7*3)+(6*8)+(5*6)+(4*8)+(3*8)+(2*7)+(1*0)=177
177 % 10 = 7
So 138688-70-7 is a valid CAS Registry Number.

138688-70-7Relevant articles and documents

L-Iduronic acid derivatives as glycosyl donors

Tabeur, Christine,Machetto, Francoise,Mallet, Jean-Maurice,Duchaussoy, Philippe,Petitou, Maurice,Sinay, Pierre

, p. 253 - 276 (2007/10/03)

O-[Methyl (2-O-acetyl-3-O-benzyl-4-O-levulinyl-α, and β-L-idopyranosid)uronate]trichloroacetimidate and the corresponding n-pentenyl glycosides are efficient L-iduronic acid glycosyl donors. Both have been used for the high-yielding synthesis of basic disaccharide blocks which are useful for the subsequent synthesis of complex oligosaccharides related to heparin/heparan sulfate, and dermatan sulfate. In contrast, the corresponding thioethyl glycosides, thiophenyl glycosides, and fluoride, did not yield the expected disaccharides.

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