213481-47-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 213481-47-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,4,8 and 1 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 213481-47:
(8*2)+(7*1)+(6*3)+(5*4)+(4*8)+(3*1)+(2*4)+(1*7)=111
111 % 10 = 1
So 213481-47-1 is a valid CAS Registry Number.
213481-47-1Relevant articles and documents
Synthesis of pyrido[3′,2′:4,5]thieno[2,3-c]cinnolines - A new heterocyclic system
Artemov,Ivanov,Koshkarov,Shestopalov,Litvinov
, p. 96 - 101 (2007/10/03)
Pyrido[3′,2′:4,5]thieno[2,3-c]cinnolines, new heterocyclic compounds, were obtained in three steps: 1) alkylation of 3-cyanopyridine-2(1H)-thiones by o-nitrobenzyl bromide to give 2-(o-nitrobenzyl)thio-3-cyanopyridines, 2) closure of the thiophene ring in
