“…Some analytical methods, based on liquid chromatography (LC), dealing with the determination of naproxen [13][14][15][16], naproxen and naproxen glucuronide [17], and naproxen, DMnaproxen and some conjugates [18] one LC-NMR study [19] has been reported dealing with the structural characterization of naproxen and DM-naproxen glucuronides. However, an expensive instrumentation was used and a tedious stop-flow chromatography was required.…”