331663-90-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 331663-90-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,1,6,6 and 3 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 331663-90:
(8*3)+(7*3)+(6*1)+(5*6)+(4*6)+(3*3)+(2*9)+(1*0)=132
132 % 10 = 2
So 331663-90-2 is a valid CAS Registry Number.
331663-90-2Relevant academic research and scientific papers
A rearrangement of 3-pyrazolines as a missing link
Finke, Juergen A.,Huisgen, Rolf,Temme, Robert
, p. 3333 - 3343 (2007/10/03)
The thermal conversion of 4-isoxazolines to 4-oxazolines involves the transposition of two ring members. The ring-contraction and ring-expansion sequence in the reaction 2→5 has been previously clarified. The low N - N bond energy should favor an analogou
