104640-83-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 104640-83-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,6,4 and 0 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 104640-83:
(8*1)+(7*0)+(6*4)+(5*6)+(4*4)+(3*0)+(2*8)+(1*3)=97
97 % 10 = 7
So 104640-83-7 is a valid CAS Registry Number.
104640-83-7Relevant academic research and scientific papers
CYCLISATION DE COMPOSES ETHYLENIQUES PAR ASSISTANCE D'IONS SELENIRANIUMS
Rouessac, Francis,Zamarlik, Henri
, p. 2643 - 2646 (2007/10/02)
Acid-catalyzed cyclization of ethylenic selenolactone 3 derived from homogeranic acid 1 affords one bicyclic lactone 5.This intramolecular rearrangement is induced by a seleniranium ion.