A pair of novel geometrically isomeric triterpenoid saponins named escins IVa and IVb, together with known escins Ia and Ib. were isolated from the seeds of Aesculus chinensis. Their structures were determined on the ...A pair of novel geometrically isomeric triterpenoid saponins named escins IVa and IVb, together with known escins Ia and Ib. were isolated from the seeds of Aesculus chinensis. Their structures were determined on the basis of spectroscopic evidences and comparison.展开更多
Three new triterpenoid saponins, escins IVg (1), IVh (2) and VIb (3) were isolatedfrom the seeds of Aesculus chinensis along with two known saponins, escin IIIa (4) anddesacylescin I (5). Their structures were elucida...Three new triterpenoid saponins, escins IVg (1), IVh (2) and VIb (3) were isolatedfrom the seeds of Aesculus chinensis along with two known saponins, escin IIIa (4) anddesacylescin I (5). Their structures were elucidated by spectroscopic analysis and chemicalhydrolysis.展开更多
A new triterpenoid saponin named escin IV e was isolated from the seeds of Aesculus chinensis. Its structure was established as 28-tigloylprotoaescigenin-3 beta-O- [beta-D-glucopyranosyl (1-2)] [beta-D-glucopyranosyl ...A new triterpenoid saponin named escin IV e was isolated from the seeds of Aesculus chinensis. Its structure was established as 28-tigloylprotoaescigenin-3 beta-O- [beta-D-glucopyranosyl (1-2)] [beta-D-glucopyranosyl (1-4)] -beta-D-glucopyranosiduronic acid.展开更多
The floral organogenesis and development of Delavaya toxocarpa Franch. （Sapindaceae） were studied trader scanning electron microscope and light microscope to determine its systematic position within Sapindaceae. Flo...The floral organogenesis and development of Delavaya toxocarpa Franch. （Sapindaceae） were studied trader scanning electron microscope and light microscope to determine its systematic position within Sapindaceae. Flowers arise in terminal thyrses. The sepal primordia initiate in a spiral （2/5） sequence, which are not synchronous. The five petal primordia initiate almost synchronously and alternate with sepal primordia. Eight stamens initiate almost simultaneously and their differentiation precedes that of the petals. The last formed petal and one stamen initiate from a common primordium. Mature stamens curve inwards and cover the ovary in bud. The gynoecium begins as a hemispheric primordium on which two carpellary lobes arise simultaneously. Later in development a single gynocium is formed with two locules and two ovules per locule. Floral morphology suggests a closer affinity with Sapindaceae, although certain features of floral ontogenesis are similar to those observed in certain members of the former Hippocastanaceae, such as Handeliodendron.展开更多
文摘A pair of novel geometrically isomeric triterpenoid saponins named escins IVa and IVb, together with known escins Ia and Ib. were isolated from the seeds of Aesculus chinensis. Their structures were determined on the basis of spectroscopic evidences and comparison.
文摘Three new triterpenoid saponins, escins IVg (1), IVh (2) and VIb (3) were isolatedfrom the seeds of Aesculus chinensis along with two known saponins, escin IIIa (4) anddesacylescin I (5). Their structures were elucidated by spectroscopic analysis and chemicalhydrolysis.
文摘A new triterpenoid saponin named escin IV e was isolated from the seeds of Aesculus chinensis. Its structure was established as 28-tigloylprotoaescigenin-3 beta-O- [beta-D-glucopyranosyl (1-2)] [beta-D-glucopyranosyl (1-4)] -beta-D-glucopyranosiduronic acid.
基金supported by South China Botanical Garden, Chinese Academy of Sciences.
文摘The floral organogenesis and development of Delavaya toxocarpa Franch. （Sapindaceae） were studied trader scanning electron microscope and light microscope to determine its systematic position within Sapindaceae. Flowers arise in terminal thyrses. The sepal primordia initiate in a spiral （2/5） sequence, which are not synchronous. The five petal primordia initiate almost synchronously and alternate with sepal primordia. Eight stamens initiate almost simultaneously and their differentiation precedes that of the petals. The last formed petal and one stamen initiate from a common primordium. Mature stamens curve inwards and cover the ovary in bud. The gynoecium begins as a hemispheric primordium on which two carpellary lobes arise simultaneously. Later in development a single gynocium is formed with two locules and two ovules per locule. Floral morphology suggests a closer affinity with Sapindaceae, although certain features of floral ontogenesis are similar to those observed in certain members of the former Hippocastanaceae, such as Handeliodendron.
