663919-53-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 663919-53-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,3,9,1 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 663919-53:
(8*6)+(7*6)+(6*3)+(5*9)+(4*1)+(3*9)+(2*5)+(1*3)=197
197 % 10 = 7
So 663919-53-7 is a valid CAS Registry Number.
663919-53-7Relevant academic research and scientific papers
Lithium-liquid ammonia mediated carbocyclisation of δ,ε- unsaturated esters: Annulation of cyclopentanones
Srikrishna,Ramasastry
, p. 379 - 382 (2007/10/03)
Lithium-liquid ammonia mediated carbanion cyclisation of δ,ε-unsaturated esters leading to cyclopentanes, fused as well as spiro, via annulation is described.
