Two new triterpenoid glucosides ecliptasaponin A(3)and ecliptasaponin B(4)were isolated together with echinocystic acid(1)and oleanolic acid(2)from Eclipta alba(L.) Hassk.Their structures were deduced as 3β,16a-dihyd...Two new triterpenoid glucosides ecliptasaponin A(3)and ecliptasaponin B(4)were isolated together with echinocystic acid(1)and oleanolic acid(2)from Eclipta alba(L.) Hassk.Their structures were deduced as 3β,16a-dihydroxy olean-12-ene-28-oic acid-3β-O-β-D-glu-copyranoside(3)and 3β-O-[β-D-glucopyranosyl(1-4)]-β-D-glucopyranosyl-16a-hydroxy olean-12-ene-28-oic acid 28-O-β-D-glucopyranoside(4),based on spectral analysis and chemical evidences as well as results ofhydrolysis.展开更多
Seven triterpenoid saponins were isolated from the 10% EtOH extract of the root of Glycyrrhiza inflata Bat. On the basis of chemical and spectroscopic methods,two of them were identified as glycyrrhetic acid-3-O-β-...Seven triterpenoid saponins were isolated from the 10% EtOH extract of the root of Glycyrrhiza inflata Bat. On the basis of chemical and spectroscopic methods,two of them were identified as glycyrrhetic acid-3-O-β-D-6”-ethyl-glucuronopyranosyl-(1→2)-β-D-6’-n-butyl-glucuro-nopyranoside(1),and glycyrrhetic acid-3-O-β-D-6”-n-butyl-glucuronopyranosyl-(1→2)-β-D-6’-n-ethyl-glucuronopyranoside(2). Both are new compounds and named inflasaponins Ⅱ and Ⅵ respec-tively.展开更多
Three new triterpenoid saponins, namely prostratosides A-C (1-3), were isolated from the whole plant of Polycarpon prostratum (Forssk.) Aschers. et Schwein. ex Aschers. By spectroscopic methods, their structures wer...Three new triterpenoid saponins, namely prostratosides A-C (1-3), were isolated from the whole plant of Polycarpon prostratum (Forssk.) Aschers. et Schwein. ex Aschers. By spectroscopic methods, their structures were determined as 3_O_{β_D_xylopyranosyl_(1→2)_β_D_glucopyranosyl_(1→4)_[β_D_glucopyranosyl_(1→2)]_α_L_arabinopyranoside}_22α_acetoxy_saikogenin G, 3_O_{β_D_xylopyranosyl_(1→2)_β_D_glucopyranosyl_(1→4)_[β_D_glucopyranosyl_(1→2)]_α_L_arabinopyranoside}_16α_hydroxy_22α_acetoxy_saikogenin E and 3_O_{β_D_xylopyranosyl_(1→2)_β_D_glucopyranosyl_(1→4)_[β_D_glucopyranosyl_(1→2)]_α_L_arabinopyranoside}_21β_acetoxy_saikogenin G, respectively.展开更多
文摘Two new triterpenoid glucosides ecliptasaponin A(3)and ecliptasaponin B(4)were isolated together with echinocystic acid(1)and oleanolic acid(2)from Eclipta alba(L.) Hassk.Their structures were deduced as 3β,16a-dihydroxy olean-12-ene-28-oic acid-3β-O-β-D-glu-copyranoside(3)and 3β-O-[β-D-glucopyranosyl(1-4)]-β-D-glucopyranosyl-16a-hydroxy olean-12-ene-28-oic acid 28-O-β-D-glucopyranoside(4),based on spectral analysis and chemical evidences as well as results ofhydrolysis.
文摘Seven triterpenoid saponins were isolated from the 10% EtOH extract of the root of Glycyrrhiza inflata Bat. On the basis of chemical and spectroscopic methods,two of them were identified as glycyrrhetic acid-3-O-β-D-6”-ethyl-glucuronopyranosyl-(1→2)-β-D-6’-n-butyl-glucuro-nopyranoside(1),and glycyrrhetic acid-3-O-β-D-6”-n-butyl-glucuronopyranosyl-(1→2)-β-D-6’-n-ethyl-glucuronopyranoside(2). Both are new compounds and named inflasaponins Ⅱ and Ⅵ respec-tively.
文摘Three new triterpenoid saponins, namely prostratosides A-C (1-3), were isolated from the whole plant of Polycarpon prostratum (Forssk.) Aschers. et Schwein. ex Aschers. By spectroscopic methods, their structures were determined as 3_O_{β_D_xylopyranosyl_(1→2)_β_D_glucopyranosyl_(1→4)_[β_D_glucopyranosyl_(1→2)]_α_L_arabinopyranoside}_22α_acetoxy_saikogenin G, 3_O_{β_D_xylopyranosyl_(1→2)_β_D_glucopyranosyl_(1→4)_[β_D_glucopyranosyl_(1→2)]_α_L_arabinopyranoside}_16α_hydroxy_22α_acetoxy_saikogenin E and 3_O_{β_D_xylopyranosyl_(1→2)_β_D_glucopyranosyl_(1→4)_[β_D_glucopyranosyl_(1→2)]_α_L_arabinopyranoside}_21β_acetoxy_saikogenin G, respectively.
