Chemical and Chemotaxonomical Studies of Filices. XLVII. Chemical Studies on the Constituents of Arachniodes nigrospinosa (CHING) CHING, A. festina (HANCE) CHING and A. mutica OHWI

抄録

Two new compounds, II and III, were isolated, together with 4-hydroxynicotinamide, from the fronds of both Arachniodes nigrospinosa and A. festina. The structures of II and III were elucidated as (E)-1-(2, 3, 4, 6-tetramethoxyphenyl) but-2-en-1-one and (E)-1-(2, 3, 4, 6-tetramethoxyphenyl) pent-2-en-1-one, respectively. Ryomenin (I) was isolated from the fronds of A. mutica.