198715-89-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 198715-89-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,7,1 and 5 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 198715-89:
(8*1)+(7*9)+(6*8)+(5*7)+(4*1)+(3*5)+(2*8)+(1*9)=198
198 % 10 = 8
So 198715-89-8 is a valid CAS Registry Number.
198715-89-8Relevant academic research and scientific papers
Syntheis of Some New Pyrazolotriazines, Pyrazolothiazines and Pyrazolopyrimidines
El-Dean, A. M. Kamal,Geies, A. A.
, p. 2255 - 2269 (2007/10/03)
When the pyrazole derivatives 3a,b were treated with triethyl orthoformate, the pyrazolotriazinethiones 5a,b were obtained.These were S-alkylated to give compounds 6a-d.Treatment of 5a,b with hydrazine hydrate in ethanol afforded 7,8 respectively.Benzylid
