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203259-05-6

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203259-05-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 203259-05-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,2,5 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 203259-05:
(8*2)+(7*0)+(6*3)+(5*2)+(4*5)+(3*9)+(2*0)+(1*5)=96
96 % 10 = 6
So 203259-05-6 is a valid CAS Registry Number.

203259-05-6Downstream Products

203259-05-6Relevant articles and documents

Synthesis of 4-guanidinopyrimidine nucleosides for triple helix-mediated guanine and cytosine recognition

Doronina, Svetlana O.,Behr, Jean-Paul

, p. 547 - 550 (2007/10/03)

Recognition of DNA sequences by triple helix-forming oligonucleotides is restricted to homopurine sequences. Based on geometrical considerations, a single nucleoside, 4-guanidinocytidine 1, was designed to recognize both guanosine (as the natural 1β anomer) and cytidine (as the 1α anomer) in a new triple helix context where the third strand is centered in the major groove of the target duplex. Several methods of synthesis of this nucleoside are described.

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