Antibacterial and cytotoxic triterpenoids from the ethanol extract of Dysoxylum densiflorum (Blume) Miq

- Three new triterpenoids were isolated from Dysoxylum densiflorum (Blume) Miq.
- Two known triterpenoids were also obtained from the titled plant.
- The isolated triterpenoids were evaluated in vitro for antibacterial and cytotoxic properties.
- They all exhibited moderate antibacterial and cytotoxic activities.

A chemical investigation of the stem bark of Dysoxylum densiflorum (Blume) Miq. afforded three new triterpenoids, dysoxylumin A-C (1-3) together with two known compounds, 24-nor-5α,13α,14α,17α-chola-7,20,22-trien-3-one (4) and 24-norchola-1,20,22-triene-3,7-dione (5). Their structures were determined on the basis of spectroscopic analyses, including 1D-NMR, 2D-NMR, and HR-ESI-MS. The isolated components were evaluated in vitro for antibacterial properties against two Gram-positive and five Gram-negative bacteria and cytotoxicities against six tumor cell lines. As a result, triterpenoids 2-5 exhibited moderate antibacterial and cytotoxic activities.