5442-23-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5442-23-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,4,4 and 2 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 5442-23:
(6*5)+(5*4)+(4*4)+(3*2)+(2*2)+(1*3)=79
79 % 10 = 9
So 5442-23-9 is a valid CAS Registry Number.
5442-23-9Relevant articles and documents
Purines. part XVI
Mosselhi, Mosselhi A.,Pfleiderer, Wolfgang
experimental part, p. 2115 - 2134 (2011/02/17)
A series of N-substituted 8-aminoxanthines (=8-amino-3,7(or 3,9)-dihydro-1H-purine-2,6-diones) 8-16 and 34-37 were synthesized from the corresponding 8-nitroxanthines 1-7, 30-33, and 8-(phenylazo)xanthines 17 and 18 by catalytic reduction. Another approac