81719-04-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81719-04-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,1 and 9 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81719-04:
(7*8)+(6*1)+(5*7)+(4*1)+(3*9)+(2*0)+(1*4)=132
132 % 10 = 2
So 81719-04-2 is a valid CAS Registry Number.
81719-04-2Relevant articles and documents
Synthesis of genkwanin
Hossain, M. Amzad
, p. 927 - 928 (2007/10/03)
Genkwanin (3) isolated from a Chinese drug Yuen Hua has been synthesized. 2,6-Dihydroxy-4-methoxyacetophenone (1) is condensed with p-hydroxybenzaldehyde to give the chalcone 2 which on DDQ oxidation afford the genkwanin (3). All the compounds have been characterized on the basis of spectral data and microanalysis.