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The bioactive components of CostusÂ  spicatus Â leaves have been evaluated using GC/MS. The chemical compositions of the ethanolic extract of CostusÂ  spicatus Â leaves were investigated using Perkin-Elmer Gas Chromatographyâ€“Mass Spectrometry, while the mass spectra of the compounds found in the extract was matched with the National Institute of Standards and Technology (NIST) library. GC/MS analysis of ethanolic extract of CostusÂ  spicatus Â leaves revealed the existence of 1,2-Ethanediol, monoacetate (2.79%), 1-Tetradecanol (0.09%), Elema-1,3,11(13)-trine-12-ol (0.31%), beta-costol (0.33%), 4,7,10,13,16,19-Docosahexacnoic acid (0.57%), methyl ester (5.15%), Naphtho[1,2-6]furan-3-one (1.27%), 2,3,3a,4,5,5a,6,7,9a,9b- decahydro-3,5a-9-trimethyl-7,9a-peroxy (0.39%), Eremanthin (93.44%), 5-(ethynyl) nona-1,8-dien-5-ol (0.19%), Benzeneacetic acid (0.10%), Alpha-bergamotene (0.38%), 1,2-Benzenedicarboxylic acid, diisooctyl ester (2.55%), Isolongifolene, 4,5-dehydro- (3.68%) by GCMS analysis and the biological activity of each compound was discussed in this paper. As CostusÂ  spicatus Â can grow and spread easily and because of its higher biomass availability, it can prove as an effective and cheaper drug for various diseases. Â Key words: CostusÂ  spicatus , GCMS analysis, Bioactive components.

PHYTOCHEMICAL ANALYSIS OF LEAF EXTRACT OF PLANT COSTUS SPICATUS BY GCMS METHOD