134408-33-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 134408-33-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,4,0 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 134408-33:
(8*1)+(7*3)+(6*4)+(5*4)+(4*0)+(3*8)+(2*3)+(1*3)=106
106 % 10 = 6
So 134408-33-6 is a valid CAS Registry Number.
134408-33-6Relevant articles and documents
On the Tautomerism of 2,4-Disubstituted 3,4,5,6-Tetrahydrobenzoquinazolines
Lorand, Tamas,Foeldesi, Andras,Aradi, Ferenc
, p. 209 - 213 (1991)
The tautomerism of the title compounds was investigated by 1H-, 13C-NMR and UV spectroscopy.Compound 5 was compared with respect to its spectra with those of appropriate model compounds 1,3,4, and 6.This gave evidence that 5 predominates in the tautomeric