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331971-09-6

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331971-09-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 331971-09-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,1,9,7 and 1 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 331971-09:
(8*3)+(7*3)+(6*1)+(5*9)+(4*7)+(3*1)+(2*0)+(1*9)=136
136 % 10 = 6
So 331971-09-6 is a valid CAS Registry Number.

331971-09-6Relevant articles and documents

1-Acylmethylbenzimidazole-2-sulfonic acids and their cyclization by N-nucleophiles

Kuz'Menko,Divaeva,Morkovnik,Anisimova,Borodkin,Kuz'Menko

, p. 716 - 724 (2014/07/08)

New preparation method was developed for derivatives of 1,4-dihydro-1,2,4-triazino[4,3-a]-, 2-aryl-1(9)H-, and 1-R-imidazo[1,2-a] benzimidazole underlain by newly synthesized 1-acylmethylbenzimidazole-2- sulfonic acids. The latter react with 2-aminoethanol affording along with the previously described compounds of the 1-(2-hydroxyethyl)imidazobenzimidazole series also compounds of formerly unknown polycyclic system, 2,3,11,12-tetrahydro-1,3-oxazolo[2,3-a]imidazo[1,2-a]benzimidazole.

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