142558-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142558-31-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,5,5 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 142558-31:
(8*1)+(7*4)+(6*2)+(5*5)+(4*5)+(3*8)+(2*3)+(1*1)=124
124 % 10 = 4
So 142558-31-4 is a valid CAS Registry Number.
142558-31-4Relevant articles and documents
Pyrrolo[2,1-c][1,4]benzodiazepines: A mild conversion of thiolactam into amidine
Foloppe, Mari P.,Rault, Sylvain,Robba, Max
, p. 2803 - 2804 (1992)
Reaction of 2-hydoxy pyrrolo [2,1-c] [1,4] benzodiazepines-5-one-thione or 5,11-dithiones with ammonia in presence of mercuric chloride affords new amidines in high yield.