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Ultra‐high‐performance liquid chromatography of Salvia miltiorrhiza Bunge extract in negative and positive modes, respectively (a) The total ion current chromatograms of S. miltiorrhiza Bunge extract at 50–1000 m/z. (b) UV chromatograms of S. miltiorrhiza Bunge extract at 280 nm. (c) The extracted ion chromatograms of danshensu, Sal A, Sal B, rosmarinic acid and cryptotanshinone. [Colour figure can be viewed at http://wileyonlinelibrary.com]
