Fig. 5From: Database-aided UHPLC-Q-orbitrap MS/MS strategy putatively identifies 52 compounds from Wushicha Granule to propose anti-counterfeiting quality-markers for pharmacopoeiaThe distinction of vitexin (13, upper) and isovitexin (17, below) based on MS spectra under negative model. The m/z values in purple indicated the calculated ones. The detailed MS elucidation, and identification process were shown in in Additional file 13: S13 and Additional file 17: S17Back to article page