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Sixteen naturally occurring oleanolic acid saponins and their derivatives were synthesized in an efficient and practical strategy, and their inhibitory activities against α‐glucosidase and α‐amylase were evaluated in vitro. Among all the compounds, 28‐O‐monoglucoside 8 exhibited remarkably potent inhibitory activity against α‐glucosidase with an IC50 value of 87.3 µM, which was fivefold stronger than...
The first total synthesis of benzophenone O‐glycosides (iriflophenone 2‐O‐α‐L‐rhamnopyranoside: 1 and aquilarisinin: 2) isolated from the leaves of Aquilaria sinensis and related new derivatives (3–12) was accomplished through suitable protecting group manipulations and glycosylation starting from commercially available L‐rhamnose, D‐glucose, D‐galactose, D‐mannose, D‐xylose, and 1,3,5‐trihydroxybenzene...
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