(a)
(b)
(c)
(d)
(e)
(f)
Figure 1: TFs was standardized by HPLC. (a-b) Analysis of TFs by HPLC at 271nm. (a) Standard wogonin and cardamom, (b) TFs. (c-d) Analysis of TFs by HPLC at 284nm. (c) Standard chrysin, (d) TFs. (e-f) Analysis of TFs by HPLC at 342nm. (e) Standard pinostrobin chalcone and pinocembrin, (f) TFs. 1: Wogonin; 2: Cardamom; 3: Chrysin; 4: Pinostrobin chalcone; and 5: Pinocembrin.