344453-05-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 344453-05-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,4,4,5 and 3 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 344453-05:
(8*3)+(7*4)+(6*4)+(5*4)+(4*5)+(3*3)+(2*0)+(1*5)=130
130 % 10 = 0
So 344453-05-0 is a valid CAS Registry Number.
344453-05-0Relevant articles and documents
Pyranopyrazoles III synthesis of 1H-pyrano[2,3-c]pyrazol-4-ones [1]
Khan,Ellis,Pagotto
, p. 193 - 197 (2007/10/03)
Various derivatives of title ring system were synthesized by Claisen condensation of 4 acetyl-5-hydroxypyrazoles with appropriate esters, followed by acid-catalyzed ring closure.