642486-99-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642486-99-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,2,4,8 and 6 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 642486-99:
(8*6)+(7*4)+(6*2)+(5*4)+(4*8)+(3*6)+(2*9)+(1*9)=185
185 % 10 = 5
So 642486-99-5 is a valid CAS Registry Number.
642486-99-5Relevant academic research and scientific papers
Synthesis of a shape-persistent macrocycle with intraannular carboxylic acid groups
Fischer, Matthias,H?ger, Sigurd
, p. 9441 - 9446 (2007/10/03)
The synthesis of a shape-persistent macrocycle based on the phenylene-ethynylene backbone by the intermolecular oxidative Glaser-coupling of appropriate bisacetylenes is described. The ring contains two intraannular methyl carboxylates that were hydrolyze
