Abstract
Five new triterpenoid glycosides, named campetelosides A-E (1-5), together with three known compounds, chikusetsusaponin IVa (6), umbellatoside B (7), and silvioside E (8) were isolated from the leaves of Camellia petelotii (Merr.) Sealy. Their chemical structures were determined by interpretations of HR-ESI-MS and NMR spectra. In addition, compounds 1-8 were evaluated for their α-glucosidase inhibitory effects. Compounds 1-3 significantly showed α-glucosidase inhibitory activity with IC50 values of 166.7 ± 6.0, 45.9 ± 2.6, and 395.3 ± 10.5 μM, respectively, compared to that of the positive control, acarbose, with an IC50 value of 200.4 ± 10.5 μM.
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