Based on spectroscopic analysis and chemical degradation, the structures of two saponins isolated from the methanol extract of fresh roots of Astragalus siculus Biv. were established to be that of astrasieversianin II and astragaloside I (also known as astrasieversianin IV), two saponins previously isolated from A. sieversianus Pall and A. membranaceus Benge. A complete assignment of NMR data to the two compounds 1 and 2 is reported for the first time.

• Compound ID: 27852
  

  b-D-Glcp-(1-6)-+ | b-D-Xylp2Ac3Ac-(1-3)-Subst Subst = astramembrangenin = SMILES CC1(C){3}[C@@H](O)CC[C@]2(C3)C43CC[C@]5(C)[C@@H]([C@](C)(O6)CC[C@H]6{25}C(C)(O)C){16}[C@@H](O)C[C@](C)5[C@]4([H])C{6}[C@H](O)[C@@]12[H]

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  Structure type: oligomer
  C41H68O14
  Trivial name: astragaloside I, astragaloside I (astrasieversianin IV)
  Compound class: saponin glycoside, glycoside, triterpenoid glycoside
  
   
  
  Astragalus siculus
  CSDB ID 60304 (all data & tools)
• Compound ID: 27853
  

  b-D-Xylp-(1-6)-+ | b-D-Xylp2Ac3Ac-(1-3)-Subst Subst = astramembrangenin = SMILES CC1(C){3}[C@@H](O)CC[C@]2(C3)C43CC[C@]5(C)[C@@H]([C@](C)(O6)CC[C@H]6{25}C(C)(O)C){16}[C@@H](O)C[C@](C)5[C@]4([H])C{6}[C@H](O)[C@@]12[H]

  Show graphically

  Show legend Show as text

  Structure type: oligomer
  C41H68O14
  Trivial name: astrasieversianin II
  Compound class: saponin glycoside, glycoside, triterpenoid glycoside
  
   
  
  Astragalus siculus
  CSDB ID 160307 (all data & tools)