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RP-HPLC-MS chromatograms in selected ion monitoring mode (SIM, negative ionization) of free sugars fraction of D. palmatum herb (low-temperature sample). SIM with following m/z value used: 179 for glucose, 341 for sucrose, 503 for raffinose, 665 for stachyose. On cuts, mass spectra of corresponding compounds; AU, absorbance units.
