Structure of terminic acid, a dihydroxytriterpene carboxylic acid from Terminalia arjuna

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Abstract

The structure of terminic acid, a new dihydroxytriterpene carboxylic acid isolated from the roots of Terminalia arjuna, has been established as 3β, 13β-dihydroxylup-20(29)-en-28-oic acid by a study of its chemical reactions and spectroscopic data. Terminic acid and its derivatives were found to undergo skeletal rearrangement under protonic conditions to yield oleanene lactone.

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Part 3 in the series “Chemical Examination of the Roots of Terminalia arjuna”. For Part 2 see ref. [2].

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