81990-61-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81990-61-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,9 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 81990-61:
(7*8)+(6*1)+(5*9)+(4*9)+(3*0)+(2*6)+(1*1)=156
156 % 10 = 6
So 81990-61-6 is a valid CAS Registry Number.
81990-61-6Relevant academic research and scientific papers
Reactions of Ethyl 4,5-Dihydro-4-oxothienopyridine-6-carboxylate : Synthesis of New Thienopyridine Derivatives and Thienopyridino-as-triazines
Hassan, M. A.,El-Borai, M.,Salem, M. A. I.
, p. 112 - 114 (2007/10/02)
Ethyl 4,5-dihydro-4-oxothienopyridine-6-carboxylate (I) has been used as the starting compound for the synthesis of some new thienopyridines and thienopyrido-as-triazines.
