117970-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117970-20-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,9,7 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 117970-20:
(8*1)+(7*1)+(6*7)+(5*9)+(4*7)+(3*0)+(2*2)+(1*0)=134
134 % 10 = 4
So 117970-20-4 is a valid CAS Registry Number.
117970-20-4Relevant articles and documents
Synthese von natuerlichen Haloindolen via Hetero-Cope-Umlagerung von Vinyl-N-phenylhydroxamaten
Martin, Pierre
, p. 344 - 347 (1988)
An efficient method for the synthesis of natural 4-chloro-6-methoxyindole (the promutagen from fava beans) and of the two 4,6-dibromo- and 3,4,6-tribromoindoles (produced by acorn worms, Enteropneusta) is presented.The key step is a hetero-Cope rearrangem