71970-93-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71970-93-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,9,7 and 0 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 71970-93:
(7*7)+(6*1)+(5*9)+(4*7)+(3*0)+(2*9)+(1*3)=149
149 % 10 = 9
So 71970-93-9 is a valid CAS Registry Number.
71970-93-9Relevant articles and documents
2-ARYLFUROPYRROLES
Krutosikova, Alzbeta,Kovac, Jaroslav,Kralovicova, Eva
, p. 772 - 777 (2007/10/02)
Preparation of ethyl 2-(4-tolyl)-4H-furopyrrole-5-carboxylate, alkylation and hydrolysis of ethyl 2-phenyl- and 2-(tolyl)furopyrrole-5-carboxylate are described.Also the synthesis of 2-phenyl- and 2-(4-tolyl)-4H-furopyrroles and their