Abstract

Cox, Hirst and Reynolds1 in investigating Szent-Györgyi's hexuronic acid, have suggested that, this acid may have the following structures: COOH.CO.CO.CH2.CHOH.CH2OH⇄ COOH.CO.C(OH)=CH.CHOH.CH2OH It will be noted that the second (enol) structure has a double bond. The acid reduces neutral silver nitrate, Fehling's solution, iodine and neutral permanganate2, and yields a trimethyl ether and a triacetyl derivative.

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