220505-01-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220505-01-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,5,0 and 5 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 220505-01:
(8*2)+(7*2)+(6*0)+(5*5)+(4*0)+(3*5)+(2*0)+(1*1)=71
71 % 10 = 1
So 220505-01-1 is a valid CAS Registry Number.
220505-01-1Relevant articles and documents
The first direct transformation of 2,2'-dihydroxychalcones into coumestans
Kamara, B. Irene,Brandt, E. Vincent,Ferreira, Daneel
, p. 861 - 868 (2007/10/03)
Three coumestans, flemichapparin, medicagol and sophoracoumestan B, are synthesised by direct reaction of the analogous 2,2'-dihydroxychalcones with thallium (III) nitrate in methanol.