Using various chromatographic separations, three new acylated flavonoid glycosides, namely barringosides G−I (1−3), were isolated from the water-soluble extract of Barringtonia racemosa branches and leaves. The structure elucidation was performed by extensive analysis of the 1D and 2D NMR and HR-QTOF-MS data. Of the isolated compounds, barringoside I (3) showed moderate inhibitory effects on LPS-induced NO production in RAW264.7 cells with an IC50 of 52.48 ± 1.04 µM.

Using various chromatographic separations, two triterpenoid glucosides and three triterpenoid acids were isolated from a methanol extract of the Barringtonia racemosa branches and leaves. Their structures were elucidated as niga‐ichigoside F1 (1), rosamultin (2), 23‐hydroxytormentic acid (3), arjunic acid (4), and maslinic acid (5) by using extensive NMR spectroscopic analysis as well as comparison of the NMR data with those reported. This is the first report of compounds 1‐4 from B. racemosa.

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Chromatographic separations of a methanol extract of Barringtonia acutangula leaves resulted in the isolation of four flavonoid glycosides. Using extensive NMR spectroscopic analysis as well as comparison with the reported data, their structures were elucidated as quercetin 3‐O‐β‐D‐(6‐p‐hydroxybenzoyl)galactopyranoside (1), quercetin 3‐O‐α‐L‐arabinopyranosyl‐(1→2)‐β‐D‐galactopyranoside (2), kaempferol 3‐O‐β‐D‐galactopyranoside (3), and quercetin‐3‐O‐β‐D‐galactopyranoside (4).