Abstract
From the seed coat of Bixa orellana fruits, six minor carotenoids and one C 14-carotenoid derivative were isolated by chromatography (CC, TLC, HPLC) and their structures elucidated by means of spectroscopy (UV-visible, MS, 1H and 13C NMR). Dimethyl (9 Z,9′ Z)-6,6′-diapocarotene-6,6′-dioate, methyl (9 Z)-10′-oxo-6,10′-diapocaroten-6-oate, methyl (9 Z)-6′-oxo-6,5′-diapocaroten-6-oate and methyl (4 Z)-4,8-dimethyl-12-oxo-dodecyl-2,4,6,8,10-pentaenoate are new compounds, whereas methyl bixin and methyl (9 Z)-8′-oxo-6,8′-diapocaroten-6-oate have previously been found in annatto.
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