15521-04-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 15521-04-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,5,2 and 1 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 15521-04:
(7*1)+(6*5)+(5*5)+(4*2)+(3*1)+(2*0)+(1*4)=77
77 % 10 = 7
So 15521-04-7 is a valid CAS Registry Number.
15521-04-7Relevant articles and documents
β-enaminonitriles in heterocyclic synthesis: Synthesis of new 1,4-dihydropyridine, pyrazolo[1,5-a]pyrimidine, aminothiophene and pyridine derivatives
Hafiz, Ibrahim S. A.
, p. 321 - 325 (2007/10/03)
Utility of 3-aminocinnamonitrile (1) in the synthesis of new 1,4-dihydropyridine, pyrazolo[1,5-a]pyrimidine, aminothiophene and pyridine derivatives is reported.