Peaks 33 and 39: Ellagic acid hexoside (ellagitannin) and ellagic
acid. The UV spectral data for these two peaks were quite similar,
giving two absorption maximums at 252/360 (Fig. 4b) and 252/
366 nm, respectively. The mass spectra of peak 39 had a signal at m/z
301.0, which indicated the presence of ellagic acid, which was
confirmed by co-elution of a commercial reference sample. The mass
spectra of compound 33 had a molecular ion at m/z 463.0, which
differs from those of the ellagic acid by 162 mass units, equivalent to
the mass of a hexose-type sugar. Additionally, fragmentation of this
peak by MS/MS showed fragments at m/z 311, 301 and 169,
respectively. The last two ions are evidence for the presence of
ellagic and gallic acid precursors in the molecular ion. All these data
indicate that it was a question of an ellagic acid hexoside.
Peaks 33 and 39: Ellagic acid hexoside (ellagitannin) and ellagicacid. The UV spectral data for these two peaks were quite similar,giving two absorption maximums at 252/360 (Fig. 4b) and 252/366 nm, respectively. The mass spectra of peak 39 had a signal at m/z301.0, which indicated the presence of ellagic acid, which wasconfirmed by co-elution of a commercial reference sample. The massspectra of compound 33 had a molecular ion at m/z 463.0, whichdiffers from those of the ellagic acid by 162 mass units, equivalent tothe mass of a hexose-type sugar. Additionally, fragmentation of thispeak by MS/MS showed fragments at m/z 311, 301 and 169,respectively. The last two ions are evidence for the presence ofellagic and gallic acid precursors in the molecular ion. All these dataindicate that it was a question of an ellagic acid hexoside.
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