193959-69-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 193959-69-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,9,5 and 9 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 193959-69:
(8*1)+(7*9)+(6*3)+(5*9)+(4*5)+(3*9)+(2*6)+(1*9)=202
202 % 10 = 2
So 193959-69-2 is a valid CAS Registry Number.
193959-69-2Relevant academic research and scientific papers
Synthesis of 5H-pyrazino[2,3-b]indoles from indole-2,3-dione derivatives
Bergman, Jan,Vallberg, Hans
, p. 742 - 752 (2007/10/03)
Reaction of N-acetylindol-2,3-diones with ethylenediamines gave the dihydropyrazinones 11, which could, after dehydrogenation and deacetylation, be transformed to the corresponding 5H-pyrazino[2,3-e]indoles 5. N,N-Dimethylaminoethylation of the anion of 5
