259217-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 259217-20-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,9,2,1 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 259217-20:
(8*2)+(7*5)+(6*9)+(5*2)+(4*1)+(3*7)+(2*2)+(1*0)=144
144 % 10 = 4
So 259217-20-4 is a valid CAS Registry Number.
259217-20-4Relevant articles and documents
Synthesis of endothiopeptides and their cyclization to 1,3-thiazol- 5(4H)-imines
Lehmann, Juerg,Heimgartner, Heinz
, p. 1899 - 1915 (1999)
Further investigations of the synthesis of endothio analogues of the segment 1-10 (8) of an apolar analogon of zervamicin IIA are described. The endothiodecapeptide Boc-Trp-Ile-Ala-Aib-Ile-Val-Aib-Leu-Aib-Ψ(CS)-Pro-OMe (10) has been prepared in good yield
