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90653-47-7

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90653-47-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90653-47-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,6,5 and 3 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 90653-47:
(7*9)+(6*0)+(5*6)+(4*5)+(3*3)+(2*4)+(1*7)=137
137 % 10 = 7
So 90653-47-7 is a valid CAS Registry Number.

90653-47-7Relevant articles and documents

Acid-labile Histidine Side-chain Protection: the N(?)-t-Butoxymethyl Group

Colombo, Roberto,Colombo, Fabio,Jones, John H.

, p. 292 - 293 (2007/10/02)

N(α)-Benzyloxycarbonyl-N(?)-t-butoxymethyl-L-histidine (1) and N(α)-fluoren-9-ylmethoxycarbonyl-N(?)-t-butoxymethyl-L-histidine (2) have been prepared and their use for the synthesis of peptides containing histidine residues has been demonstrated in two simple exercises; no difficulties were encountered, the base- and hydrogenolysis-resistant imidazole protecting group ultimately being removed by mild acidolysis.

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