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(Daegu Catholic University) (Daegu Catholic University) (Hanoi University of Science and Technology) (Korea Institute of Toxicology) (Korea Institute of Toxicology) (Korea Institute of Toxicology) (Daegu Catholic University) (Kyungpook National University) (Daegu Catholic University)
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한국생약학회 Natural Product Sciences Natural Product Sciences Vol.32 No.1
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    초록·키워드

    Phytochemical investigation of the water extract and alkaloid fraction of Areca catechu L. led to the isolation of one new methoxyflavonoid rutinoside (1), together with eleven known compounds (2−12), five of which (8−12) belong to the pyridine alkaloid class. The structure of the new compound was elucidated through extensive spectroscopic analyses, including 1D and 2D NMR experiments and high-resolution mass spectrometry. Notably, rhamnazin-3-O-rutinoside (2) is reported here for the first time from this species. The isolated compounds were evaluated for their inhibitory activity against protein tyrosine phosphatase 1B (PTP1B) using a p-nitrophenyl phosphate assay. Flavonoids (3 and 4) and stilbene (5) exhibited notable inhibitory activity, with IC<sub>50</sub> values of 13.30 ± 0.71, 13.44 ± 0.84, and 8.68 ± 0.12 μM, respectively. In contrast, methoxyflavonoid rutinosides (1 and 2) and pyridine alkaloids (8−12) did not show significant inhibitory activity against PTP1B. These findings provide additional chemical insights into A. catechu and its constituents in relation to PTP1B inhibition.

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