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http://dx.doi.org/10.5012/jkcs.2004.48.4.394

Three Norisoprenoids from the Brown Alga Sargassum thunbergii  

Park, Ki-Eui (Devision of Ocean Science, Korea Martime University)
Kim, You-Ah (Devision of Ocean Science, Korea Martime University)
Jung, Hyun-Ah (Research Institute of Marine Science and Technology (RIMST), Korea Martime University)
Lee, Hee-Jung (Research Institute of Marine Science and Technology (RIMST), Korea Martime University)
Ahn, Jong-Woong (Devision of Ocean Science, Korea Martime University)
Lee, Burm-Jong (Department of Chemistry, Inje University)
Seo, Young-Wan (Devision of Ocean Science, Korea Martime University)
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Abstract
From Sargassum thunbergii which is widely distributed in coastal area of Korea, three norisoprenoids, (+)-epiloliolide (1), (-)-loliolide (2), and apo-9'-fucoxanthinone (3) were isolated by using column chromatography and reverse-phase HPLC. Compound 1, 2 and 3 were for the first time isolated from the Brown Alga Sargassum thunbergii. Particularly, Compound 1 was for the first time isolated the marine organism although it was reported from the terrestrial plant. Their structures have been determined by extensive 2-D NMR experiments such as $^1H COSY, NOESY, HMQC$, and HMBC and by comparison with the reported data in the literature.
Keywords
Brown Alga; Sargassum thunbergii; Norisoprenoid;
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