20461-53-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20461-53-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,6 and 1 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20461-53:
(7*2)+(6*0)+(5*4)+(4*6)+(3*1)+(2*5)+(1*3)=74
74 % 10 = 4
So 20461-53-4 is a valid CAS Registry Number.
20461-53-4Relevant articles and documents
Modified Knoevenagel-Stobbe Preparation of Substituted Pyridines: a New Approach to Streptonigrinoids
Ciufolini, Marco A.,Byrne, Norman E.
, p. 1230 - 1231 (2007/10/02)
Dihydropyrans obtained by cyclocondensation of aromatic enones with vinyl ethers are transformed into pyridines by treatment with hydroxylamine hydrochloride.
