90049-83-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90049-83-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,0,4 and 9 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 90049-83:
(7*9)+(6*0)+(5*0)+(4*4)+(3*9)+(2*8)+(1*3)=125
125 % 10 = 5
So 90049-83-5 is a valid CAS Registry Number.
InChI:InChI=1/C8H5N3O3/c12-11(13)7-3-1-2-6(4-7)8-9-5-14-10-8/h1-5H
90049-83-5Relevant articles and documents
An approach to pyrimidine N-oxides: Carboxamide oximes as precursors
Mlakar, Biserka,?tefane, Bogdan,Ko?evar, Marijan,Polanc, Slovenko
, p. 961 - 973 (2007/10/03)
A method for the synthesis of pyrimidines N-oxides is described. Various carboxamide oximes were treated with the appropriate 1,3-dicarbonyl compounds or their equivalents in the presence of trifluoroacetic acid as a catalyst to give the corresponding pyr