title: Ultraviolet derivatization of digitalis glycosides as 4-nitrobenzoates for liquid chromatographic trace analysis.
mesh_terms: D002853:Chromatography, Liquid; D004071:Digitalis Glycosides / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D009579:Nitrobenzoates / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D004071:Digitalis Glycosides; D009579:Nitrobenzoates