781657-64-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 781657-64-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,8,1,6,5 and 7 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 781657-64:
(8*7)+(7*8)+(6*1)+(5*6)+(4*5)+(3*7)+(2*6)+(1*4)=205
205 % 10 = 5
So 781657-64-5 is a valid CAS Registry Number.
781657-64-5Relevant articles and documents
Synthesis of a polysulfated heparin degradation product
Kuszmann, Janusz,Medgyes,Boros
, p. 344 - 348 (2007/10/03)
Two suitable methods for the synthesis of the heparin degradation product 2,5-anyhydro-3-O-(α-L-ido-pyranosyluronate)-D-mannitol hexa O-sulfate are reported. The synthesis pathways start from D-glucose and D-glucosamine.