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The first analytical procedure for the determination of a new naphthopyrone, eleutherinoside A, together with the known bioactive compounds eleuthoside B, isoeleutherin, eleutherin and eleutherol in Eleutherine americana was established. Optimum HPLC separation of these naphthoquinone derivatives was possible on RP-12 column material, using water and acetonitrile as mobile phase. Flow-rate, detection...
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