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Bioassay-directed separation of the ethyl acetate extract from the aerial parts of Saussurea involucrata (Kar. et Kir. ex Maxim) led to the isolation of three new sesquiterpene lactones sausinlactones A (1), B (2), C (3) and six known ones (4–9). The structures were established by spectroscopic data (UV, IR, HRESIMS, 1D and 2D NMR). CD technique was also employed to determine the absolute configurations...
Derivatives based on a benzotropolone skeleton (9–26) have been prepared by the enzymatic coupling (horseradish peroxidase/H2O2) of selected pairs of compounds (1–8), one with a vic-trihydroxyphenyl moiety, and the other with an ortho-dihydroxyphenyl structure. Some of these compounds have been found to inhibit TPA-induced mice ear edema, nitric oxide (NO) synthesis, and arachidonic acid release by...
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