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1H spectra of the printed material acquired with a single-voxel PRESS sequence at three different echo times. The zero ppm reference is based on literature values of the first resonance of similar compounds (see text). The two major resonances (~1.0 and ~3.5 ppm) are seen to be phased upright at 30 and 288 ms while at 144 ms TE the resonance at ~1.0ppm is inverted.
