89972-33-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89972-33-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,9,7 and 2 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 89972-33:
(7*8)+(6*9)+(5*9)+(4*7)+(3*2)+(2*3)+(1*3)=198
198 % 10 = 8
So 89972-33-8 is a valid CAS Registry Number.
89972-33-8Relevant articles and documents
SYNTHESIS AND BASE-CATALYZED RECYCLIZATION OF 3-ARYLAMINOCARBONYLANTHRA-6-ISOXAZOLONES
Gornostaev, L. M.,Lavrikova, T. I
, p. 1279 - 1282 (1983)
Thermolysis of 1-azido-2-arylaminocarbonylanthraquinones in nonpolar solvents leads to 3-arylaminocarbonylanthra-6-isoxazolones.By the action of bases, these compounds recyclize in aprotic solvents into 2-arylanthra-1H-pyrazolin-3,6,11-trio