Anti-bacteria activity of Puraboeo rutescens and Lysionotus pauciflorus / 中国中药杂志

ABSTRACT

<p><b>OBJECTIVE</b>Antibacteria activity of compounds from Puraboeo ruescens and Lysionotus pauciflorus was assayed.</p><p><b>METHOD</b>Disc diffusion was used to isolate compounds in vitro and berberine was positive control. The value of IC50 was assayed by the method of liquid culture. All kinds of chromatography were used to isolate the chemical constituent and structure was identified by MS and NMR spectroscopy.</p><p><b>RESULT</b>Eight compounds were isolated and identified as beta-sitosterol (1), E-3,4-dihydroxy cinnamic acid (2), barbinervic acid (3), 3beta,19alpha-dihydroxy12-en-28-ursolic acid (4), 28-O-beta-D-glucopyranosyl pomolic acid (5), 5,7-dihydroxy-6,8,4'-trimethoxy flavone (6), 5, 6, 4'-trihydroxy-7,8-dihydroxy flavone (7), 5-hydroxy-6,8,4'-trimethoxy flavone-7-O-beta-D-glucopyranosyl (8). Compound 3, 4 and 6 had activity against SA, MRSA and ESBLs respectively. Compound 3 showed (IC50 = 0.098 g x LU(-1), IC50 = 0.27 g x L(-1)) against SA and ESBLs-SA respectively. Compound 4 (IC50 = 0.130 g x L(-1)) was best to against MR SA.</p><p><b>CONCLUSION</b>Compound 1 - 5 were isolated from this plant for the first time. Compound 7 and 8 was isolated from Gesneriaceae for the first time.</p>