128421-82-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128421-82-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,4,2 and 1 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 128421-82:
(8*1)+(7*2)+(6*8)+(5*4)+(4*2)+(3*1)+(2*8)+(1*2)=119
119 % 10 = 9
So 128421-82-9 is a valid CAS Registry Number.
128421-82-9Relevant articles and documents
Synthesis and Reactions of Endothiopeptides
Guziec, Frank S.,Wasmund, Loide Mayer
, p. 1301 - 1353 (2007/10/02)
Direct replacement of oxygen by sulphur in a peptide bond results in an endothiopeptide.This replacement can be accomplished by use of Lawesson's reagent 1; however, significant limitations are associated with this method.An improved procedure for the dir