The essential oil of Dittrichia viscosa subsp. revoluta and its fractions were assessed for anti-Helicobacter activity. The essential oil was isolated by hydrodistillation, submitted to flash column chromatography and analysed by gas chromatography, gas-chromatography coupled to mass spectrometry and 13C-nuclear magnetic resonance. The anti-Helicobacter activity was determined by incorporation of the crude esse...
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