Fig. 6

A PCA score plot derived from UPLC-Q/TOF–MS/MS datasets of K. interior and other three crude drugs. B OPLS-DA score plot derived from UPLC-Q/TOF–MS/MS datasets of K. interior and other three crude drugs. C Heatmap of the metabolite profiles of K. interior and other three crude drugs. The legend on the right and top indicates the grouping of metabolites and sample groups, respectively