117663-43-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117663-43-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,6,6 and 3 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 117663-43:
(8*1)+(7*1)+(6*7)+(5*6)+(4*6)+(3*3)+(2*4)+(1*3)=131
131 % 10 = 1
So 117663-43-1 is a valid CAS Registry Number.
117663-43-1Relevant articles and documents
Regioselective Reactions of Tetra- and Penta-substituted Pyrroles
Mukherjee, Anita,Sharma, V. L.,Seth, M.,Bhaduri, A. P.
, p. 537 - 541 (2007/10/02)
Regioselective formylation, hydroxymethylation and benzoylation in 1,2-dimethyl-3-methoxycarbonyl-4-phenyl- or substituted phenyl-pyrroles (1-4) lead to the formation of the corresponding 5-substituted derivatives (9-12).Chemoselectivity in the reaction o
