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The HPLC analysis chromatograms of HRT-BU and fHRT-BU at 254 nm (a) and 380 nm (b). (1) Geniposide t R 27.96 min; (2) berberine t R 37.27 min; (3) palmatine t R 37.54 min; (4) baicalin t R 41.16 min; (5) t R 28.18 min; (6) t R 34.50 min; (7) t R 43.08 min; (8) t R 61.30 min.
