ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The carotenoid composition of the carotenoprotein asteriarubin ex the starfish Asterias rubens, determined by HPLC, comprised canthaxanthin (6, 3% of total), all-trans-astaxanthin (1, 14%), all-trans-7,8-didehydroastaxanthin (2, 24%), all-trans-7,8,7′,8′-tetradehydroastaxanthin (3, 43%) and 4-oxomytiloxanthin (7, 10%). The previously unknown 4-oxomytiloxanthin was tentatively identified by the UV./VIS., 'H-NMR. spectra and MS. data.The optical purity was determined by HPLC. of the di-(-)-camphanates, by comparison with those of synthetic standards: 7,8,7′, 8′-tetradehydroastaxanthin (92% (3S, 3′S), 2% meso), 7,8-didehydroastaxanthin (89% (3S,3′S), 2% meso?), and astaxanthin (78% (3S,3′S), 14% (3R,3′S), and 5% (3R,3′R)). It is concluded that the acetylenic derivatives of astaxanthin in contrast to astaxanthin from marine animal sources are essentially pure (3S, 3′S)-isomers. This might reflect their probable metabolic formation by 4-oxo modification of acetylenic (3R,3′R)-carotenols ex Mytilus edulis in their diet.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19820650727
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