333998-25-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 333998-25-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,3,9,9 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 333998-25:
(8*3)+(7*3)+(6*3)+(5*9)+(4*9)+(3*8)+(2*2)+(1*5)=177
177 % 10 = 7
So 333998-25-7 is a valid CAS Registry Number.
333998-25-7Relevant articles and documents
[1]Benzopyrano[2,3,4-i,j]isoquinolines: A new, versatile route from 1-bromoxanthones
García, Alberto,Domínguez, Domingo
, p. 5219 - 5221 (2001)
[1]Benzopyrano[2,3,4-i,j]isoquinolines were synthesized from a bromoxanthone by assembly of the isoquinoline ring in three steps: vinylation, hydroamination and ring-closing reduction of the xanthone carbonyl.