Flavonoid glycosides from the aerial parts of Acacia pennata in Myanmar

Five flavonoid glycoside (1–5) together with six known compounds were isolated from the aerial parts of Acacia pennata in Myamar. Their structures were determined by 1D, 2D NMR, UV, MS and CD data. [Display omitted] •Phytochemical study of Acacia pennata has been performed.•Five flavonoid glycosides were determined by spectroscopic data.•The flavonoid glycosides feature a non-substituted B-ring in the flavonoid aglycone. Phytochemical investigations of the aerial parts of Acacia pennata (Mimosaceae) from Myanmar led to the isolation of five flavonoid glycosides and six known compounds. The new compounds were identified as (2R,3S)-3,5,7-trihdyroxyflavan-3-O-α-l-rhamnopyranoside, (2S)-5,7-dihydroxyflavan-7-O-β-d-glucopyranoside-(4α→8)-epiafzelechin-3-O-gallate, (2R)-4′,7-dihydroxyflavan-(4α→8)-(2R,3S)-3,5,7-trihdyroxyflavan-3″-O-α-l-rhamnopyranoside, 5,7-dihydroxyflavone 6-C-β-boivinopyranosyl-7-O-β-d-glucopyranoside, and 5,7-dihydroxyflavone 7-O-β-d-glucopyranosyl-8-C-β-boivinopyranoside based on interpretation of spectroscopic data.