213181-24-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 213181-24-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,1,8 and 1 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 213181-24:
(8*2)+(7*1)+(6*3)+(5*1)+(4*8)+(3*1)+(2*2)+(1*4)=89
89 % 10 = 9
So 213181-24-9 is a valid CAS Registry Number.
213181-24-9Relevant articles and documents
4-Hydroxyquinol-2-ones. 86. Synthesis of methyl (ethyl) esters of 1-substituted 4-amino-2-oxoquinoline-3-carboxylic acids
Ukrainets,Sidorenko,Gorokhova
, p. 1151 - 1157 (2007/10/03)
Several variants of the synthesis of esters of 1-N-substituted 4-amino-2-oxoquinoline-3-carboxylic acids have been studied, one of which is recommended as preparative. 2005 Springer Science+Business Media, Inc.