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Abstract
The separation of the cliastereoisomers of cinnamoyl derivatives have been studied by thin-layer (TLC) and high performance liquid chromatography (HPLC). TLC separations on two different layers and with two different solvent systems are described. HPLC separation was carried out on a reversed-phase column (Lichrosorb RP-8., 5 urn) using an isocratic elution [acetonitrile : water-acetic acid (95 : 5)]. The series of compounds includes the cis/trans isomers of ethyl esters of caffeic, ferulic and isoferulic acids.