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Representative basic peak ion (BPI) chromatograms of natural and artificial Resina Draconis in negative ion mode by ultra-high-performance-liquid-chromatography with quadrupole time of flight mass spectrometry (UHPLC-QTOF-MS/MS). (A) Natural Resina Draconis sample (NRD); (B) artificial induced Resina Draconis (AIRD) sample. The peak numbers are the same as displayed in Table 1.
