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Ultra high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry (UPLC-ESI-MS/MS) chromatogram of NXQ extract.1 = Succinic acid, 2 = 3,4-dihydroxybenzoic acid, 3 = furan-2-carboxylic acid, 4 = quercetin-3-O-galactoside, 5 = quercetin-3-O-glucoside, 6 = quercetin-3-O-rutinoside, 7 = myricetin, 8 = kaempferol-3-O-glucoside, 9 = quercetin, 10 = kaempferol.
