132973-05-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 132973-05-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,2,9,7 and 3 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 132973-05:
(8*1)+(7*3)+(6*2)+(5*9)+(4*7)+(3*3)+(2*0)+(1*5)=128
128 % 10 = 8
So 132973-05-8 is a valid CAS Registry Number.
132973-05-8Relevant articles and documents
Synthesis of Derivatives of Pyrazinopyridimidin-4-ones
Dennin, F.,Blondeau, D.,Sliwa, H.
, p. 1639 - 1643 (2007/10/02)
3-Alkoxy-2-aminopyrazines have been condensed with ethyl ethoxymethylenemalonate and isopropylidene methoxymethylenemalonate to afford 9-alkoxypyrazinopyrimidin-4-ones substituted in the first case by an ethoxycarbonyl group at 3 position.