652539-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 652539-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,2,5,3 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 652539-20:
(8*6)+(7*5)+(6*2)+(5*5)+(4*3)+(3*9)+(2*2)+(1*0)=163
163 % 10 = 3
So 652539-20-3 is a valid CAS Registry Number.
652539-20-3Relevant articles and documents
Synthesis of New Hydroxy-2-styrylchromones
Santos, Clementina M. M.,Silva, Artur M. S.,Cavaleiro, Jose A. S.
, p. 4575 - 4585 (2007/10/03)
Hydroxy-2-styrylchromones 5a-i were prepared by debenzylation of benzyloxy-2-styrylchromones 3a-i, which were synthesised by the Baker-Venkataraman method. The last step of this method, the cyclodehydration 5-aryl-3-hydroxy-1-(2-hydroxyaryl)-2,4-pentadien