502157-80-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 502157-80-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,2,1,5 and 7 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 502157-80:
(8*5)+(7*0)+(6*2)+(5*1)+(4*5)+(3*7)+(2*8)+(1*0)=114
114 % 10 = 4
So 502157-80-4 is a valid CAS Registry Number.
502157-80-4Relevant articles and documents
En route to archimedene: Total synthesis of C3h-symmetric [7]phenylene
Bruns, Dirk,Miura, Hirokazu,Vollhardt, K. Peter C.,Stanger, Amnon
, p. 549 - 552 (2007/10/03)
(Matrix presented) The total synthesis of C3h-symmetric [7]phenylene has been accomplished by triple cobalt-catalyzed cycloisomerization of an appropriate nonayne. Its spectral data are in accord with the expectations for a triply angularly fus