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Chromatogram of the 13 the quality markers of traditional Chinese medicines (TCMs; all together: Q-markers) and internal standard (sequence numbers A–N are GA, 5-CQA, 3-CQA, CA, 4-CQA, chloramphenicol, 3,4-diCQA, hyperoside, rutin, 4,5-diCQA, kaempferol-3-O-rutinoside, quercetin, kaempferol, and tussilagone, respectively).
