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Table 2 Chemical markers in RPM samples from different geographical origins by UPLC-QTOF/MS

From: Discrimination of Radix Polygoni Multiflori from different geographical areas by UPLC-QTOF/MS combined with chemometrics

No. t (min) m/z (−) Fragment information Compound name Compound type Formula Max fold change VIP value
C1 0.79 191.0197 191.0197, 173.0091 Citric acid Organic acids C6H8O7 4.72 4.11
C2 2.86 881.1917 881.1917, 863.1829, 591.1144, 217.0506, 152.0015 3,3′-di-O-Galloyl-procyanidin B2 Polyphenols C44H34O20 8.12 5.12
C3 5.68 405.2810 405.2810, 243.1911, 227.0425, 215.0702, 201.0545, 173.0596 2,3,5,4′-Tetrahydroxystilbene-2-O-glucoside Stilbene glycosides C20H22O9 2.01 6.15
C4 8.06 431.0981 431.0981, 269.0455, 265.0506, 263.0350, 253.0506, 241.0506, 227.0350, 224.0478, 210.0322, 182.0373 Emodin-8-O-glucoside Anthraquinone glycosides C21H20O10 31.99 5.20
C5 8.53 407.1347 407.1347, 245.0819, 230.0948, 202.0635, 159.0451 Torachrysone-8-O-glucoside Anthraquinone glycosides C20H24O9 7.78 4.28
C6 8.65 473.1085 473.1085, 456.1062, 431.0983, 269.0455, 265.0506, 253.0506, 240.0428, 227.0350, 224.0478, 210.0322, 182.0373 Emodin-O-(acetyl)-hexoside Anthraquinone derivatives C23H22O11 4.42 7.54
C7 9.30 487.0638 487.0638, 470.0734, 445.0369, 283.0604, 240.0428, 212.0478, 197.0244, 184.0505, 169.0278 Physcion-O-(acetyl)-hexoside Anthraquinone derivatives C23H22O12 4.73 3.80
C8 10.18 285.0398 285.0398, 269.0455, 253.0506, 240.0428, 227.0350, 224.0478, 210.0322, 182.0373 Citreorosein Anthraquinones C15H10O6 34.91 4.25
C9 12.50 283.0604 283.0604, 240.0428, 212.0478, 197.0244, 184.0505, 169.0278 Physcion Anthraquinones C16H12O5 2567.78 6.46