705167.fig.001a
(a)
705167.fig.001b
(b)
Figure 1: Chemical structures (a) and HPLC chromatogram (b) of reference standards with detection at 280 nm (I) and 340 nm (II), AKH extract at 280 nm (III) and 340 nm (IV).Alpinetin (1), pinocembrin (2), and cardamonin (3).