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219949-98-1

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219949-98-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219949-98-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,4 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 219949-98:
(8*2)+(7*1)+(6*9)+(5*9)+(4*4)+(3*9)+(2*9)+(1*8)=191
191 % 10 = 1
So 219949-98-1 is a valid CAS Registry Number.

219949-98-1Relevant articles and documents

Fused mesoionic heterocycles: Synthesis of [1,2,3]triazolo[1,5-a]quinoline, [1,2,3]triazolo[1,5-a]quinazoline, [1,2,3]triazolo[1,5-a]quinoxaline and [1,2,3]triazolo[5,1-c]benzotriazine derivatives

Abbott, Phillip A,Bonnert, Roger V,Caffrey, Moya V,Cage, Peter A,Cooke, Andrew J,Donald, David K,Furber, Mark,Hill, Steve,Withnall, Jane

, p. 3185 - 3198 (2007/10/03)

General methods are descibed for the synthesis of mesoionic derivatives of [1,2,3]triazolo[1,5-a]quinoline, [1,2,3]triazolo[1,5-a]quinazoline, [1,2,3]triazolo[1,5-a]quinoxaline and [1,2,3]triazolo[5,1-c]benzotriazine.

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