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Abstract
A new phthalic acid ester 1,2-benzenedicarboxylic acid bis(2S-methyl heptyl) ester (1) was isolated from the hexane extract of the whole plant of Ajuga bracteosa. In addition, chloroform and methanol extracts yielded neo-clerodane diterpene ajugarin-I and two iridoid glycosides, reptoside and 8-O-acetyl harpagide. The structures of all the compounds were confirmed by extensive spectroscopic analysis. From the two oily fractions nine and six volatile constituents respectively were identified by GCMS. Linalyl acetate was found to be common in both the oil fractions. This plant is a new source of linalyl acetate, a valuable perfumery compound.
Acknowledgements
The authors are thankful to Dr P.S. Ahuja, Director, for providing necessary facilities. They are also grateful to Dr Brijlal of Biodiversity group for identification of the plant. Thanks are also due to Dr A.P. Gupta for running the NMR spectra and to Mrs Ruchi Acharya for running GCMS spectra of the oily fractions.