In vitro and in silico antioxidant and α-glucosidase inhibitory potential of compounds isolated from .

Nine compounds including a new one, garcichaudiic acid (), were isolated from the bark of and their structures were characterized mainly by 1 D and 2 D NMR experiments. The antioxidant capacity of the isolated compounds was determined using DPPH radical scavenging assay and the anti-hyperglycemic activity was assessed by measuring the inhibitory effect against α-glucosidase. Among them, compound showed higher antioxidant activity than the positive control, ascorbic acid, while both compounds and exhibited more significant α-glucosidase inhibitory activity than the reference drug acarbose.

Triterpenoids from the bark of .

Two new triterpenoids, entanolide () and methyl 3,4-secotirucalla-23-oxo-4(28),7,24-trien-21-al-3-oate (), together with nine known compounds (), were isolated from the bark of . Their structures were elucidated based on spectroscopic analyses, mainly 1 D and 2 D NMR spectral data. Compounds - and were evaluated for their cytotoxicity against HepG2 cells, and compounds exhibited weak activities.