A New Neolignan and a New Sesterterpenoid from the Stems of Picrasma quassioidesBennet
Chemistry & Biodiversity2011Vol. 8(6), pp. 1163–1169
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Abstract
A new dihydrobenzofuran-type neolignan, picrasmalignan A (1), and a new sesterterpene lactone, 2'-isopicrasin A (4), were isolated from the stems of Picrasma quassioides Bennet, along with four known compounds, comprising two neolignans, 2 and 3, a sesterterpene lactone, 5, and a flavonol, 6. The structures of these compounds were determined by detailed analysis of NMR and MS data, and comparison with the literature data. Compounds 1-6 were tested for their anti-inflammatory activity, and 1-3 and 6 showed potent inhibitory activities on nitric oxide, tumor necrosis factor-α, and interleukin-6 production in mouse monocyte-macrophage RAW 264.7 stimulated by lipopolysaccharide (LPS).
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