Fig. 1

Total-ion chromatograms and select-ion chromatograms of reference standard and gypenosides. a Total-ion chromatograms of reference standard; b Total-ion chromatograms of gypenosides sample; c Select-ion chromatograms of reference standard; d Select-ion chromatograms of gypenosides sample; 1, gypenosides XLIX; 2, Gypenosides A