208993-97-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 208993-97-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,8,9,9 and 3 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 208993-97:
(8*2)+(7*0)+(6*8)+(5*9)+(4*9)+(3*3)+(2*9)+(1*7)=179
179 % 10 = 9
So 208993-97-9 is a valid CAS Registry Number.
208993-97-9Relevant academic research and scientific papers
A regioselective synthesis of methyl 7-amino-3-phenylthieno-[2,3-b]pyrazine-6-carboxylate
Zhang,Haight,Ford,Parekh
, p. 725 - 730 (2007/10/03)
A practical synthesis of methyl 7-amino-3-phenylthieno [2,3-b]pyrazine-6-carboxylate (1) has been achieved via a regioselective synthesis of 3-cyano-5-phenyl-3-phenylthiopyrazine (5a), by condensing 1,1-diethoxyacetophenone with 2,3-diamino-3-phenylthioac
