Phenolic compounds and ecdysteroids of Diplazium esculentum (Retz.) Sw. (Athyriaceae) from Japan and their chemotaxonomic significance.

Four phenolic compounds, (2 R)-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. Image 1 • Four phenolic compounds and three ecdystreoids were isolated from Diplazium esculentum. • Ecdysteroids were isolated for the first time from Diplazium genus. • Chemotaxonomic significance of these compounds are explained in detail. [ABSTRACT FROM AUTHOR]