6H-anthra[1,9-bc]thiophene derivatives from a bryozoan,Dakaira subovoidea |
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| Authors: | T Shindo A Sato N Kasanuki K Hasegawa S Sato T Iwata T Hata |
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| Institution: | (1) New Lead Research Laboratories, Sankyo Co. Ltd., 2-58, 1-chome, Hiromachi, Shinagawa-ku, 140 Tokyo, (Japan);(2) Analytical and Metabolic Research Laboratories, Sankyo Co. Ltd., 2-58, 1-chome, Hiromachi, Shinagawa-ku, 140 Tokyo, (Japan) |
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| Abstract: | Separation of a lipophilic extract of the bryozoan,Dakaira subovoidea, a common fouling organism of underwater structures, guided by inhibition of lipid peroxide formation in rat liver microsomes, gave 5,7-dihydroxy-1-hydroxymethyl-6-oxo-6H-anthra1,9-bc]thiophene (1a) and its 1-methoxycarbonyl derivative (1c), together with the known 1,8-dihydroxyanthraquinone (2). The structures were determined by spectral and crystallographic analyses. |
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| Keywords: | 6H-anthra[1 9-bc]thiophene derivatives antioxidant bryozoan Dakaira subovoidea sessile and fouling organism |
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