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(a,b) HPLC-ESI-MS chromatogram of G. gelida root extract in SIM-mode: {m/z 797 for gelidoside (rindoside, 131, a); m/z 781 for trifloroside (132, b)}. (c) UV spectrum of compounds 132. (d,e) Mass spectrometric fragmentation of compounds 131 (d) and 132 (e). (f) MSn spectra of compound 132.
