87693-73-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87693-73-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,6,9 and 3 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 87693-73:
(7*8)+(6*7)+(5*6)+(4*9)+(3*3)+(2*7)+(1*3)=190
190 % 10 = 0
So 87693-73-0 is a valid CAS Registry Number.
87693-73-0Relevant articles and documents
Syntesis of the new tricyclic system thieno pyridopyrazin-4-one
Frehel, Daniel,Maffrand, Jean-Pierre
, p. 143 - 149 (2007/10/02)
The new tricyclic system thienopyrido(1,2-a)pyrazin-4-one, a thiophenic isostere of the heterocyclic system pyrazino(1,2-a)isoquinolin-4-one is synthesised by cyclization in acidic medium from 4-acyl-6-hydroxy-1-piperazin-