• Archives of Pharmacal Research
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• v.17 no.6
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• pp.470-475
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• 1994

The butanol extract of paulownia tomentosa stem showed antibacterial activity against staphyl ococcus aureus (SG511, 285 and 503), Streptococcus pyogenes (A308 and A77) and Streptococcus farcium MD8b etc. The most active compound of the extractg was identified to be campneoside I, which had a minimal inhibitory concentration(MIC) of $150{\;}{\mu}g/ml$ against Strptococcus and Staphylococcus species. From such antibacterial activity, the methoxy group of campneoside I was posulated to be the essential element for the antibacterial activity.