173919-05-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 173919-05-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,9,1 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 173919-05:
(8*1)+(7*7)+(6*3)+(5*9)+(4*1)+(3*9)+(2*0)+(1*5)=156
156 % 10 = 6
So 173919-05-6 is a valid CAS Registry Number.
173919-05-6Relevant articles and documents
Gelsemine Support Studies: Observation of An Unusual Free Radical Cyclization-Fragmentation Sequence
Hart, David J.,Kuzmich, Daniel
, p. 873 - 876 (2007/10/03)
Treatment of vinylogous urethanes 9a and 9b with tri-n-butyltin hydride generated a free radical that underwent cyclization-fragmentation to afford oxindole-ketones 10 and 11 in high yield.Vinylogous urethane 13, gave only cyclization-reduction products 1
