NMR Preparation and Analysis. HMF, MMF, and EMF formed during extraction under thermal acidic conditions of quinoa seeds were prepared using 2 N HCl in deionized water, methanol, and ethanol, respectively, in separate experiments as described above. Samples were neutralized using sodium bicarbonate prior to liquid−liquid extraction with methylene chloride. The organic layer was subsequently dried over magnesium sulfate and filtered with anhydrous methylene chloride rinses. The resulting extract was dried using rotary evaporation in vacuo. Prior to acquisition of NMR spectra, each dried sample was mixed with CDCl3. 1H NMR spectra were recorded on a Bruker Avance 400 MHz spectrometer equipped with a Cryoplatform Prodigy cryoprobe. Chemical shift (δ) values for 1H NMR spectra are reported in parts per million (ppm) from tetramethylsilane with the solvent resonance as the internal standard (CDCl3, 7.24 ppm).