1028258-44-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1028258-44-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,8,2,5 and 8 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1028258-44:
(9*1)+(8*0)+(7*2)+(6*8)+(5*2)+(4*5)+(3*8)+(2*4)+(1*4)=137
137 % 10 = 7
So 1028258-44-7 is a valid CAS Registry Number.
1028258-44-7Relevant articles and documents
Synthetic studies toward diazonamide A. Preparation of the benzofuranone-indolyloxazole fragment
Wipf, Peter,Yokokawa, Fumiaki
, p. 2223 - 2226 (2007/10/03)
The benzofuranone-indolyloxazole fragment of the polycyclic marine natural product diazonamide A was prepared from tryptamine. The oxazole ring was synthesized from an α keto-indole via cyclodehydration with Ph3P/Cl3CCCl3,