219716-05-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219716-05-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,7,1 and 6 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 219716-05:
(8*2)+(7*1)+(6*9)+(5*7)+(4*1)+(3*6)+(2*0)+(1*5)=139
139 % 10 = 9
So 219716-05-9 is a valid CAS Registry Number.
219716-05-9Relevant articles and documents
Novel bridgehead nitrogen heterocyclic systems: Synthesis, stereochemistry and biological activity of pyrazolo thiazolo-s-triazoles
Mohan, Jag
, p. 953 - 955 (2007/10/03)
A facile synthesis of 2,3-diaryl-cis-3,3a-dihydropyrazolothiazolo-s-triazoles 3 has been achieved by the condensation of 3-(p-tolyl)-s-triazole-5-thione 1 with chloroacetic acid and aldehydes in the presence of acetic anhydride, anhydro