855774-20-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 855774-20-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,5,7,7 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 855774-20:
(8*8)+(7*5)+(6*5)+(5*7)+(4*7)+(3*4)+(2*2)+(1*0)=208
208 % 10 = 8
So 855774-20-8 is a valid CAS Registry Number.
855774-20-8Relevant articles and documents
Modified coumarins. 14. Synthesis of 7-hydroxy-[4,3′]dichromenyl-2, 2′-dione derivatives
Dubovik,Garazd,Khilya
, p. 434 - 443 (2007/10/03)
New derivatives of 3-(2-oxochromen-4-yl)chromen-2-one, modified analogs of natural dicoumarins, were prepared from substituted coumarin-4-acetic acids.