5263-81-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5263-81-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,2,6 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5263-81:
(6*5)+(5*2)+(4*6)+(3*3)+(2*8)+(1*1)=90
90 % 10 = 0
So 5263-81-0 is a valid CAS Registry Number.
5263-81-0Relevant articles and documents
The Structure of the Reaction Product from Cotarnine and 6-Nitropiperonal
Moehrle, Hans,Jaekel, Werner,Wendisch, Detlef
, p. 715 - 728 (2007/10/02)
The accepted structure of the aminoketone 3 for the reaction product of cotarnine and 6-nitropiperonal is refuted and instead the constitution 13a is proved.