190121-99-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 190121-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,1,2 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 190121-99:
(8*1)+(7*9)+(6*0)+(5*1)+(4*2)+(3*1)+(2*9)+(1*9)=114
114 % 10 = 4
So 190121-99-4 is a valid CAS Registry Number.
190121-99-4Relevant articles and documents
Suramin analogues with a 2-phenylbenzimidazole moiety as partial structure. 1. Carboxylic acid analogues
Kreimeyer,Magor,Nickel
, p. 268 - 271 (2007/10/03)
The synthesis of carboxylic acid analogues of suramin bearing the 2-phenyl-benzimidazole moiety as part of their structure is described. Azomethines 3a-c and 5a-c obtained from 3,4-diaminobenzoic acid (1) and nitrobenzaldehydes (2) are oxidized with oxyge