89026-40-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89026-40-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,0,2 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 89026-40:
(7*8)+(6*9)+(5*0)+(4*2)+(3*6)+(2*4)+(1*0)=144
144 % 10 = 4
So 89026-40-4 is a valid CAS Registry Number.
89026-40-4Relevant articles and documents
SYNTHESIS OF UMBELLIFOLIDE AND THREE NATURAL EUDESMAN-12,8-OLIDES FROM (-)-ARTEMISIN
Marco, J. Alberto,Carda, Miguel
, p. 2523 - 2532 (1987)
The syntheses of the natural 4,5-secoeudesmanolide 1 (umbellifolide) and the eudesmanolides 2, 3 and 4 are described.The starting materials are synthetic eudesmane derivatives, the preparation of which from (-)-artemisin had been previously reported.