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210109-71-0

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210109-71-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 210109-71-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,0,1,0 and 9 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 210109-71:
(8*2)+(7*1)+(6*0)+(5*1)+(4*0)+(3*9)+(2*7)+(1*1)=70
70 % 10 = 0
So 210109-71-0 is a valid CAS Registry Number.

210109-71-0Relevant articles and documents

8-Azaadenosine and its 2'-deoxyribonucleoside: Synthesis and oligonucleotide base-pair stability

Seela,Munster,Lochner,Rosemeyer

, p. 1139 - 1155 (1998)

The synthesis of 8-azaadenosine (1a; z8A) has been performed by SnCl4- catalyzed glycosylation of 8-azaadenine (4) with 1,2,3,5-tetra-O-acetyl-β- D-ribofuranose (5), followed by the separation of the regioisomers 6 an d7 and subsequent deacetylation. The ribonucleoside 1a as well as its 2'-deoxy derivative 1b (z8A(d)) were converted into oligonucleotide building blocks- the phosphonate 2 as well as the phosphoramidites 3 and 19. They were used to prepare the oligoribonucleotide (z8A-U)6 and oligodeoxyribonucleotides. The T(m) values and the thermodynamic data of duplex formation of the modified duplexes showed no significant changes compared to those containing A(d) or A residues. This indicates that the stereoelectronic effect of the 8-azaadenine base which was found for the monomeric nucleoside has only a minor influence on the duplex stability.

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