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81187-04-4

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81187-04-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81187-04-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,8 and 7 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81187-04:
(7*8)+(6*1)+(5*1)+(4*8)+(3*7)+(2*0)+(1*4)=124
124 % 10 = 4
So 81187-04-4 is a valid CAS Registry Number.

81187-04-4Downstream Products

81187-04-4Relevant articles and documents

Simplified Liquid-Phase Preparation of Four Decadeoxyribonucleotides and their Preliminary Spectroscopic Characterization

Denny, William A.,Leupin, Werner,Kearns, David R.

, p. 2372 - 2393 (2007/10/02)

Four self-complementary decadeoxyribonucleotides, dApTpApTpApTpApTpApT,dApTpApTpCpGpApTpApT, dApTpApTpGpCpApTpApT and dApApApApApTpTpTpTpT, were chemically synthesized by the phosphotriester procedure.Efforts were concentrated on keeping the procedure as simple as possible, concomitant with obtaining high-purity products at each step of the process.The decamers were elaborated from the 3'-end, starting with a 3'-O-benzoylated monomer according to the scheme: monomer + monomer -> dimer + dimer -> tetramer + dimer -> hexamer + tetramer -> decamer.Putity of intermediates and of the fully blocked decamers were monitored by chromatography and by 300-MHz 1H-NMR. spectroscopy.The deblocked decadeoxyribonucleotides were characterized by their UV., CD., and 1H-NMR. spectra.

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