Distribution of caffeic acid derivatives in Gundelia tournefortii L.

The caffeic acid derivatives including neochlorogenic acid (3-COA), cryptochlorogenic acid (4-CQA), chlorogenic acid (5-CQA) and caffeic acid (CA) have been characterised in Gundelia tournefortii using reference compounds, chemical, spectral evidences and chromatographic data. In addition, the total phenolic content and chlorogenic acid were measured in the leaf, hull-less seed, and skin extracts of this herb by the Folin–Ciocalteu reagent and high performance liquid chromatography (HPLC), respectively. The sample analysis was carried out on a C18 column with 5% (v/v) aqueous acetic acid and methanol as the mobile phase, under gradient elution at ambient temperature, at 325 nm. The amount of chlorogenic acid in the leafs (at the flowering stage and after it) and hull-less seed were 984, 466 and 199 mg per 100 g dry plant sample and the total phenolic content in their dry extract were 128.4, 103.8 and 76.3 μg/mg as CGA equivalent, respectively.