943904-74-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 943904-74-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,3,9,0 and 4 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 943904-74:
(8*9)+(7*4)+(6*3)+(5*9)+(4*0)+(3*4)+(2*7)+(1*4)=193
193 % 10 = 3
So 943904-74-3 is a valid CAS Registry Number.
943904-74-3Relevant articles and documents
A new bipyrrole coupling reaction
Nikitin, Edward B.,Nelson, Michael J.,Lightner, David A.
, p. 739 - 743 (2008/09/18)
(Chemical Equation Presented). Pyrrole 8 was converted to 10 in 4 steps, and 10 was coupled directly to bipyrroles 1 in a Sonogashira reaction, respectively at the 3,3′ positions.
