81649-90-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81649-90-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,4 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81649-90:
(7*8)+(6*1)+(5*6)+(4*4)+(3*9)+(2*9)+(1*0)=153
153 % 10 = 3
So 81649-90-3 is a valid CAS Registry Number.
81649-90-3Relevant academic research and scientific papers
THE SYNTHESIS OF AN UNUSUAL DIHYDROPYRENE CONTAINING ONE AROMATIC ?-CLOUD WITHIN AND PERPENDICULAR TO A SECOND.
Mitchell, Reginald H.,Anker, Willem
, p. 5139 - 5140 (2007/10/02)
trans-10b-methyl-10c-phenyl-10b,10c-dihydropyrene is prepared.Its 1Hmr spectrum shows the internal aryl protons are the most highly shielded aryl protons yet reported.
