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Planta Med 1980; 39(5): 81-84
DOI: 10.1055/s-2008-1074907
Research Articles

© Georg Thieme Verlag Stuttgart · New York

Isolation of two New Alkannin Esters from Alkanna tinctoria

V. P. Papageorgiou, G. A. Digenis
  • Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA
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Publication Date:
29 April 2008 (online)

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Abstract

Two new pigments having naphthaquinone structure were isolated from the roots of Alkanna tinctoria Tausch. The UV, IR, NMR and Mass spectra were recorded and the compounds were characterized as 5,8-dihydroxy-2-(1'-isovaleryl-oxy-4'-methylpent-3'-enyl)-1,4-naphthaquinone (alkannin isovalerate) and 5,8-dihydroxy-2-(l '-methylcrotonoyl-oxy-4 '-methylpent-3 -enyl)-1,4-naphthaquinone (alkannin angelate).

Key Word Index

Boraginaceae - Alkanna tinctoria - Hydroxynaphthaquinones - Alkannin Esters.