Two new stilbenes, 1 and 2, were isolated as leishmanicidal constituents from the methanolic extract of Lonchocarpus nicou leaves and stem, together with five known stilbenes and rotenoids. Their chemical structures were determined by spectral methods. Among them, the cis stilbene-type compounds 1 and 4 showed potent leishmanicidal activity (IC50: 5.5, 3.9 µg/mL), while the trans stilbene-type compounds 2 and 5, and rotenoids 6 and 7, showed moderate activities (IC50: 9.9, 12.8, 22.6, 19.6 µg/mL, respectively).
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New leishmanicidal stilbenes from a Peruvian folk medicine, Lonchocarpus nicou.
Chem Pharm Bull (Tokyo)
March 2014
Research Center for Medicinal Plant Resources, National Institute of Biomedical Innovation.
Two new stilbenes, 1 and 2, were isolated as leishmanicidal constituents from the methanolic extract of Lonchocarpus nicou leaves and stem, together with five known stilbenes and rotenoids. Their chemical structures were determined by spectral methods. Among them, the cis stilbene-type compounds 1 and 4 showed potent leishmanicidal activity (IC50: 5.
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