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High performance liquid chromatography with diode array detection (HPLC-DAD) chromatograms of Phaeodactylum tricornutum extract (a), All-trans-fucoxanthin fraction obtained by high performance countercurrent chromatography (HPCCC) (b) and commercial standard of fucoxanthin from Sigma Aldrich (c). * (13 or 13′-cis)-fucoxanthin. The chromatograms were monitored at 450 nm.
