126921-97-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 126921-97-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,6,9,2 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 126921-97:
(8*1)+(7*2)+(6*6)+(5*9)+(4*2)+(3*1)+(2*9)+(1*7)=139
139 % 10 = 9
So 126921-97-9 is a valid CAS Registry Number.
126921-97-9Relevant articles and documents
SYNTHESIS OF SOME NEW FUSED THIENO- AND FUROPYRIDINES
Kamal El-Dean, A. M.,Abdel Hafez, A. A.,Attallah, A. A.
, p. 1 - 6 (2007/10/02)
Pyridone and thiopyridone derivatives (1) and (2) were considered as versatile intermediates to produce some interesting tricyclic compounds.They were converted to O- and S- alkylated pyridines (3) and (4) which undergo cycloaddition reaction to give the