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Ryu, Geon-Seek,Park, Soo-Hee,Kim, Eun-Sook,Choi, Byoung-Wook,Ryu, Shi-Yong,Lee, Bong-Ho The Pharmaceutical Society of Korea 2003 Archives of Pharmacal Research Vol.26 No.10
Two known farnesylacetone derivatives (1 and 2) were isolated from the Korean brown alga Sargassum sagamianum off Jeju Island, Korea. Compounds 1 and 2 were identified as (5E,10Z)-6, 10, 14-trimethylpentadeca-5, 10-dien-2, 12-dione and (5E,9E,13E)-6, 10,4-trimethylpentadeca-5,9,13-trien-2,12-dione, respectively, by comparison with the literature data. Compounds 1 and 2 showed moderate acetylcholinesterase and butyrylcholinesterase inhibitory activities with $IC_{50}$ values of 65.0∼48.0 and 34.0∼23.0 $\muM$, respectively.