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Positive ES mode of LC–MS of PLP aqueous extract.
Notes: Four major compounds were identified. The sequence of tR was oxypaeoniflorin, albiflorin, paeoniflorin, and benzoylpaeoniflorin.
Abbreviations: ES, electron spray; PLP, Paeonia lactiflora Pall.; LC–MS, liquid chromatography–mass spectrometry; tR, retention time.
