221209-20-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221209-20-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,2,0 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221209-20:
(8*2)+(7*2)+(6*1)+(5*2)+(4*0)+(3*9)+(2*2)+(1*0)=77
77 % 10 = 7
So 221209-20-7 is a valid CAS Registry Number.
221209-20-7Relevant academic research and scientific papers
Synthesis of reversible nucleoside amino acid conjugates
Sondhi,Xie,Modak,Bashkin
, p. 1097 - 1103 (2007/10/03)
A general synthetic method to conjugate cysteine-containing peptides to nucleosides via a disulfide link has been developed, using the heterobifunctional reagent N-succinimidyl-3-(2-pyridylthio)propionate(SPDP) and amino-modified nucleosides. Representati
