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Suwandri Suwandri
Department of Chemistry, Universitas Jenderal Soedirman, Jl. dr. Soeparno 61, Karangwangkal, Purwokerto 53123, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Antibacterial Activity of Benzyl Benzoate and Crotepoxide from Kaempferia rotunda L. Rhizome Hartiwi Diastuti; Mochammad Chasani; Suwandri Suwandri
Indonesian Journal of Chemistry Vol 20, No 1 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (298.682 KB) | DOI: 10.22146/ijc.37526

Abstract

Benzyl benzoate and crotepoxide are the major components of Kaempferia rotunda L. rhizome. However, the bioactivity study of benzyl benzoate and crotepoxide as the antibacterial activity were still limited. Therefore, the antibacterial activity of benzyl benzoate and crotepoxide against four pathogenic bacteria, i.e., Escherichia coli ATCC 25922, Enterococcus aerogenes ATCC 13048, Bacillus cereus ATCC 6538 and Staphylococcus aureus ATCC 11778 were investigated. The isolation steps were include the extraction by maceration with acetone, then the acetone extract was partitioned with n-hexane:methanol (1:1) and ethyl acetate:water (1:1) respectively. The isolation by liquid vacuum chromatography followed by column chromatography was obtained benzyl benzoate from the n-hexane fraction and crotepoxide from ethyl acetate fraction. The molecular structure of isolated compounds was identified based on NMR (1D and 2D) spectroscopic data. The antibacterial activity assay of isolated compounds was carried out using the disc diffusion method. The antibacterial evaluation confirms that the benzyl benzoate and crotepoxide exhibits a medium level activity. Benzyl benzoate showed highest antibacterial activity against B. cereus at the MIC of 50 μg/mL and inhibitory zone of 5.9 mm, while the crotepoxide showed highest antibacterial activity against E. aerogenes at the MIC of 100 μg/mL with inhibitory zone 6.1 mm.
Co-Authors Hartiwi Diastuti Mochammad Chasani