Abstract
Phytochemical research on the flower buds of Lonicera japonica Thunb. led to the isolation of 15 compounds, including nine terpenoids (1–9), three phenylpropanoid glycosides (10–12), two alkyl glycosides (13–14) and an alkaloid (15). The structures of these compounds were determined by NMR spectroscopy and comparison with data from previous literatures. Among them, eleven compounds (2–5, 8, 10 and 11–15) were reported from the genus Lonicera for the first time and compounds 3, 4, 5, 10 and 11–15 were firstly reported from the family Caprifoliaceae. Network analysis was carried out to explore the chemotaxonomic significance of these compounds for L. japonica in this study.
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