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637771-70-1

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637771-70-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 637771-70-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,7,7,7 and 1 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 637771-70:
(8*6)+(7*3)+(6*7)+(5*7)+(4*7)+(3*1)+(2*7)+(1*0)=191
191 % 10 = 1
So 637771-70-1 is a valid CAS Registry Number.

637771-70-1Relevant articles and documents

Highly fluorescent heterocycles based on pyrazino fused 1,4,5,8-tetraazafulvalenes

K?pplinger, Christian,Beckert, Rainer,Koci, Jan,Braunerova, Gabriela,Waisser, Karel,G?rls, Helmar

, p. 2457 - 2470 (2007/10/03)

Some new pyrazino-fused 1,4,5,8-tetraazafulvalenes of type (3-5) were synthesized and their structures were confirmed by IR, UV-VIS, 1H NMR spectra and elemental analysis. The X-Ray crystal structure analysis of a single crystal of derivative (

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