Figure 3. Mean plasma concentration–time profile in rat plasma after oral administration of bu-yang-huan-wu-tang extract for astragaloside I (A), astragaloside II (B), astragaloside IV (C), formononetin (D), ononin (E), calycosin (F), calycosin-7-O-β-D-glucoside (G), ligustilide (H) and paeoniflorin (I).