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Extracted ionic current (EIC) traces for: (a) m/z = 616.2 (Heme, M+); (b) m/z = 936.4 (“Complete” heme-artemether adduct 1, (M-H+Na)+; (c) m/z = 854.4 (heme-artemether adduct 2, MH+). (Inserts correspond to the mass spectra of circled chromatographic peaks).
