139293-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139293-91-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,2,9 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139293-91:
(8*1)+(7*3)+(6*9)+(5*2)+(4*9)+(3*3)+(2*9)+(1*1)=157
157 % 10 = 7
So 139293-91-7 is a valid CAS Registry Number.
139293-91-7Relevant academic research and scientific papers
FUSED IMIDAZO-, PYRIMIDO- AND 1,3-DIAZEPINOPTERIDINES FROM o-AMINOPYRAZINECARBONITRILES
Ried, Walter,Russ, Thomas
, p. 2288 - 2297 (2007/10/02)
A series of partially hydrogenated imidazopteridines IXa-IXc, XIa-XIf and XVa-XVc, pyrimidopteridines XIIa-XIId and XVIa-XVIc, and 1,3-diazepinopteridines XIIIa-XIIIc and XVII have been prepared from 2-amino-3-cyanopyrazines I via rea
