Phytochemical studies of the aerial parts of A. pennata from Myanmar led to isolation of five new flavonoid glycosides (1–5) and six known compounds (6–11). Their chemical structures were determined by interpreting 1D and 2D NMR, MS, UV, and CD data. Only two previous reports have described the constituents of A. pennata and identified terpenes and flavonoid glycosides. The new flavonoid glycosides described herein feature a non-substituted B-ring in the flavonoid aglycone.