Cook C.E., 1985: Preparative separation of demeton isomers with ito multi layer coil countercurrent chromatography. Journal Of Liquid Chromatography: 2253-2258 The active constituents of the insecticide Demeton, consisting of isomeric 0,0-diethyl (O,S)-ethylmercaptoethyl thiophosphates, have been conveniently separated on a preparative scale with an Ito multi-layer coil countercurrent system.
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