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199800-56-1

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199800-56-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199800-56-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,8,0 and 0 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 199800-56:
(8*1)+(7*9)+(6*9)+(5*8)+(4*0)+(3*0)+(2*5)+(1*6)=181
181 % 10 = 1
So 199800-56-1 is a valid CAS Registry Number.

199800-56-1Relevant articles and documents

Phthaloyl strategy - A new approach towards oligodeoxyribonucleotide synthesis

Beier, Markus,Pfleiderer, Wolfgang

, p. 1621 - 1624 (1997)

A new rapid strategy for machine-aided oligodeoxyribonucleotide synthesis has been established utilizing phthaloyl groups for protection of the heterocyclic amino functions within the phosphoramidite approach. A large number of DNA-sequences has been synt

Nucleotides: Part LXI: Phthaloyl strategy: A new concept of oligonucleotide synthesis

Beier, Markus,Pfleiderer, Wolfgang

, p. 633 - 644 (2007/10/03)

A new alternative strategy of oligonucleotide synthesis was developed by use of the phthaloyl protecting group for the exocyclic amino functions of the nucleobases (see 9-12). This approach combines the advantages of cheap and easily accessible monomeric building blocks (see 17- 20), standard machine-aided oligonucleotide synthesis, and a fast deprotection protocol which is orthogonal to the cleavage procedure from the solid support. The crude oligonucleotides show high purity and require, in general, no further chromatographic purification.

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