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Ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) chromatograms of ingredients in rat plasma: (a) blank plasma; (b) blank plasma spiked with three components and IS; and (c) plasma sample obtained 10 min after intragastric administration of Erigerin breviscapus extract (10 g/kg) (1. Chlorogenic acid; 2. puerarin (IS); 3. scutellarin; 4. scutellarein).
