Antibacterial aromatic compound and steroid glycoside isolated from duckweed Lemna paucicostata Hegelm
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چکیده
Lemna paucicostata Hegelm is traditionally used as healthy feed for fish, broilers and as a source for vitamin A. In the present study, we report the isolation of an aromatic compound and a steroid glycoside from Lemna pauciscostata . The methanolic extract of dried and powdered Lemna paucicostata was fractionated using solid phase extraction (SPE). The compound was collected in a series of fractions. While first fraction contributed (80% pure) to an aromatic compound, 3rd fraction contained a steroid glycoside. Preliminary analysis of the compounds was performed with nuclear magnetic resonance and mass spectrometry. Aromatic compound was analyzed by 1H NMR and MS spectra, steroid glycoside were analyzed by 1H NMR and IR spectra. Aromatic compound showed significant inhibition of growth (10 mm) against Gram-negative bacteria, Pseudomonas aeruginosa.
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