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Triterpenoids, 1–3, 8 and 9, along with 24 known compounds were isolated from leaves and twigs of Fagus hayatae. Of these, compound 1, 1,10-seco-3β,10α,23-trihydroxyolean-12-ene-1,28-dioic acid 1,23-lactone, possesses a hitherto unknown 1,10-seco-oleanane skeleton. In addition, 2,3-seco-20(29)-lupene-2,3-dioic acid (16), previously described as a synthetic product, is now established as a plant natural...
This study was aimed to investigate thoroughly the diarylheptanoids in the n-BuOH soluble fraction of leaves of Alnus formosana in order to examine their anti-inflammatory activities. The application of HPLC-SPE-NMR as a preliminary chemical screening led to characterization of eleven compounds. Further separation resulted in isolation of 28 compounds, of which 10 diarylheptanoids and 2-coumaroylxyloside...
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