18 ヤツデ(Fatsia japonica Decne. et Planch.)の化学成分

概要

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Fatsia japonica D. et P. has been used for a medicinal plant, but it is well known that the plant contains hemolytic constituents. We now examined the isolation and structural elucidation of chemical constituents of the leaves, the flowers, and the black seeds of Fatsia japonica in order to compare the constituents among parts of the plant. 1. Hederagenin-3-α-L-arabinoside (Saponin A), hederagenin-3-β-D-glucopyranoside (Saponin B), hederagenin-3-[β-D-glucopyranosyl (1→4)]-α-L-arabinoside (Saponin C), and Saponin D were elucidated as constituents of the acetone extract of the black seeds. Saponin D was composed of hederagenin and D-glucose, but its structure now remained unproved. Stigmasterol, palmityl triglyceride, and fatty acids (mainly C_<16> and C_<18>) were also identified. 2. From the acetone extract of the flowers, Saponin A, C, and E were isolated in addition to stigmasterol, methyl palmitate, methyl linoleate, and the fatty acids. The hydrolysis of Saponin E afforded oleanolic acid and D-glucose, but its structure is still unproved. 3. Together with stigmasterol and n-paraffins (nC_<16>〜nC_<31>), phytyl palmitate and phytyl linoleate, new naturally occurring esters, were isolated from the acetone extract of the leaves to elucidate their structure. Other constituents of the extract were Saponin A, B, C, and E.
天然有機化合物討論会の論文
1973-10-01