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Abstract

Anthraquinones And Arnidiol From Barleria Longiflora Linn F.

Author(s): E Venkata Rao, P Sridhar, J Ravi Kumar, T Vijaya Lakshmi

The chemical examination of Barleria longiflora Linn. F. is described for the first time. Extraction of stems and roots with solvents and column chromatography led to the isolation of four anthraquinones of which two are new. The known anthraquinones were identified as tectoquinone and 1,3,5-trihydroxy-4- methoxy-2-methylanthraquinone and the new anthraquinones characterised as 3,8-dihydroxy-4- methoxy-2 methylanthraquinone and 1,3,4-trihydroxy-5 (or 8)-methoxy-2-methylanthraquinone by chemical and spectral studies. Arnidiol, a pentacyclic triterpene, was isolated without admixture with its isomer faradiol which usually is the case with many plants. A sterol mixture was also isolated, the minor components of which were Identified as campesterol, stigmasterol and b-sitosterol by GCMS of the acetate mixture.