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- W1536037580 abstract "The steroidal sapogenins of 12 Japanese Dioscorea sp. were analysed. Three species do not contain sapogenins. The other nine species contain diosgenin abundantly as the aglycone of its saponins in their underground parts but very little in their aerial parts. Other steroidal sapogenins are found only in two species, D. tokoro Makino and D. tenuipes Franch. et Savat. These two species also contain the sapogenins as free sapigenins in their aerial parts. A new trihidroxysapogenin, m.p. 276–278°, was isolated from D. tenuipes and named diotigenin. With regard to the species examined, the chemical composition of the sapogenins they contain corresponds to their morphological features: (1) Dioscoreas, which have opposite leaves, stems twining to the right and edible roots, do not contain sapogenins. (2) D. bulbifera L., which has stems twining to the left and globose tuber and forms bulbils, also do not contain sapogenins. (3) The other Dioscoreas have alternate leaves, stems twining to the left and form no bulbils. They contain diosgenin. (4) Of these nine Dioscoreas, D. tokoro Makino and D. tenuipes Franch. et Savat. have similar morphological features, and they contain the sapogenins possessing an α-OH at C3 and the free sapogenins." @default.
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- W1536037580 date "1965-02-01" @default.
- W1536037580 modified "2023-09-26" @default.
- W1536037580 title "Studies on the steroidal components of domestic plants-XLIV." @default.
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- W1536037580 doi "https://doi.org/10.1016/s0031-9422(00)86151-8" @default.
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