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223726-43-0

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223726-43-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 223726-43-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,7,2 and 6 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 223726-43:
(8*2)+(7*2)+(6*3)+(5*7)+(4*2)+(3*6)+(2*4)+(1*3)=120
120 % 10 = 0
So 223726-43-0 is a valid CAS Registry Number.

223726-43-0Relevant articles and documents

Synthesis of elenic acid, an inhibitor of topoisomerase II

Hoye,Baigorria,Danielson,Pragman,Rajapakse

, p. 2450 - 2453 (1999)

A short, efficient synthesis of elenic acid, a marine natural product with interesting biological activity, has been completed. Critical features of the synthesis are the development of methodology for the one-pot elaboration of an alkyne to an (E)-β,γ-unsaturated ester with a stereocenter at the α-position and the use of the zipper reaction of a 1- arylalkyne. This reaction has not been previously reported with aromatic substrates. The synthesis strategy provides considerable flexibility for the preparation of structural analogues.

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