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MALDI MS/MS spectra of the singly protonated compounds 1, 2, and 3. (A–C) MALDI-ISD spectra, (D–F) MALDI-TOF/TOF LID spectra, (G–I) MALDI-TOF/TOF CID spectra. Neutral losses are depicted as follows: * = sugar, ’ = NH3, ° = H2O, # = Dau + sugar.
