221445-87-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221445-87-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,4,4 and 5 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 221445-87:
(8*2)+(7*2)+(6*1)+(5*4)+(4*4)+(3*5)+(2*8)+(1*7)=110
110 % 10 = 0
So 221445-87-0 is a valid CAS Registry Number.
221445-87-0Relevant academic research and scientific papers
Synthesis of branched polynuclear 1,3,4-oxadiazoles
Vereshchagin,Verkhozina,Proidakov,Smirnov,Kizhnyaev
experimental part, p. 1158 - 1163 (2009/05/28)
The reaction of 5-substituted mono-and polytetrazoles with heterocyclic acid chlorides and trifluoroacetic acid anhydride gave branched polynuclear 1,3,4-oxadiazole systems.
