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Han, Ah-Reum,Min, Hye-Young,Nam, Joo-Won,Lee, Na-Youn,Wiryawan, Adam,Suprapto, Wahyu,Lee, Sang Kook,Lee, Kang Ro,Seo, Eun-Kyoung The Pharmaceutical Society of Japan 2008 Chemical & pharmaceutical bulletin Vol.56 No.9
<P>A new naphthoquinone, (−)-3-[2-(acetyloxy)propyl]-2-hydroxy-8-methoxy-1,4-naphthoquinone (1) was isolated from the bulb of <I>Eleutherine americana</I> M<SMALL>ERR</SMALL>. <I>et</I> H<SMALL>EYNE</SMALL> (Iridaceae) together with two known compounds, eleutherinol (6) and 1,5-dihydroxy-3-methylanthraquinone (7) which were found in this species for the first time. The other known compounds, (−)-isoeleutherin (2), (+)-eleutherin (3), (−)-hongconin (4), and (+)-dihydroeleutherinol (5) which were reported previously from this species, were also isolated in the present study. Compounds 2—6 exhibited potent inhibitory activity on nitric oxide production in RAW 264.7 lipopolysaccharide-activated mouse macrophage cells with IC<SUB>50</SUB> values of 7.7, 11.4, 19.8, 21.7, and 34.4 μ<SMALL>M</SMALL>, respectively, whereas the other two compounds, 1 and 7, were inactive. The structure of compound 1 was elucidated by spectroscopic data analysis including 1D and 2D NMR experiments.</P>
Identification of a New Cytotoxic Biflavanone from Selaginella doederleinii
LEE, Na-Youn,MIN, Hye-Young,LEE, Jun,NAM, Joo-Won,LEE, Yoo-Jin,HAN, Ah-Reum,Adam WIRYAWAN,Wahyu SUPRAPTO,LEE, Sang Kook,SEO, Eun-Kyoung 이화여자대학교 약학연구소 2009 藥學硏究論文集 Vol.- No.19
A new biflavanone, 2,2˝,3,3˝-tetrahydrorobustaflavone 7,4´,7˝-trimethyl ether (1) was isolated from the whole plant of Selaginella doederleinii H_(IERON). (Selaginellaceae) together with the known biflavonoid, robustaflavone 7,4´,7˝-trimethyl ether (2) as the cytotoxic constituents against the three human cancer cell lines, HCT, NCI-H358, and K562. The structure of the new compound 1 was elucidated by spectral analysis including various 1D- and 2D-NMR experiments.