Phenolic Compounds and Ecdysteroids of Diplazium Esculentum (retz.) Sw. (athyriaceae) from Japan and Their Chemotaxonomic Significance

Four phenolic compounds, (2R)-3-(4'-hydroxyphenyl) lactic acid, trans-cinnamic acid (2), protocatechuic acid (3) and rutin (4), and three ecdysteroids, amarasterone A1 (5), makisterone C (6) and ponastrone A (7) were isolated and identified from the young fronds of Diplazium esculentum (Retz.) Sw. (Athyriaceae). The structures of these compounds were elucidated on the basis of NMR spectral data and comparison with literature values. Compounds 1, 2 and 5-7 were isolated for the first time from title plant. Their structure elucidation and chemotaxonomic significance are explained in detail.