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1. (Article ID: 11384)
Verotta L, Orsini F, Tato M, Toaima SM
A cycloartane triterpene 3β, 16β diglucoside from Astragalus trigonus and its non natural 6-hydroxy epimer
Phytochemistry 49(3) (1998)
845-852
The detailed investigation of Astralagus trigonus DC roots, led to the isolation of a new cycloartan-3 beta, 16 beta diglucoside, whose structure was elucidated by extensive use of 1D- and 2D- high field (600 MHz) NMR techniques. The NaBH4 reduction of the natural 6-ore 3 beta, 16 beta diglucoside, previously isolated from the same plant, afforded the 6-epi-derivative of the new compound. The conformational preference of both these compounds has been investigated by high field H-1 NMR spectroscopy and molecular modeling techniques.
roots, Fabaceae, 3β, 6β, Astragalus trigonus, cycloartane triterpene glucoside, 6α, 16β trihydroxy 9, 19 cyclolanost-24-ene 3β, 16β diglucopyranoside, 19 cyclolanost -24-ene 3β
Publication DOI: 10.1016/S0031-9422(97)00869-8Journal NLM ID: 0151434Publisher: Elsevier
Institutions: Dipartimento di Chimica Organica e Industriale, Università degli Studi di Milano, Milano, Italy, Pharmacia & Upjohn, Structure Based Drug Design, Milano, Italy, Faculty of Pharmacy, University of Alexandria, Alexandria, Egypt
Methods: 13C NMR, 1H NMR, molecular modeling, extraction, ROESY, TOCSY, CC, HMBC, HMQC, COSY
The publication contains the following compound(s):
- Compound ID: 23817
Structure type: oligomer
Trivial name: azukisaponin V, dehydrosoyasaponin I, azukisaponin, kaikasaponin
Compound class: saponin glycoside, glycoside, triterpenoid glycoside
Reference(s) to other database(s): CCSD:
9282, CBank-STR:22158
- Compound ID: 28886
|
b-D-Glcp-(1-6)-+
|
b-D-Xylp2Ac-(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 |
Structure type: oligomer
Trivial name: astragaloside II
Compound class: saponin glycoside, glycoside, triterpenoid glycoside
- Compound ID: 28925
|
b-D-Xylp-(1-6)-+
|
b-D-Xylp-(1-2)-b-D-Xylp-(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
Trivial name: trigonoside II
Compound class: triterpenoid glycoside
- Compound ID: 28926
|
b-D-Glcp-(1-3)-+
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b-D-Glcp-(1-16)-Subst
Subst = 3β,6α,16β-trihydroxy-9,19-cyclolanost-24-ene = SMILES C/C(C)=C\CC[C@@H](C)[C@H]4{16}[C@@H](O)C[C@@]5(C)C2C{6}[C@H](O)C1[C@@](C)(C){3}[C@@H](O)CC[C@@]13C[C@@]23CC[C@]45C |
Show graphically |
Structure type: oligomer
; 805 [M+Na]+
C42H70O13
Compound class: triterpenoid glycoside
- Compound ID: 28927
|
b-D-Glcp-(1-3)-+
|
b-D-Glcp-(1-16)-Subst
Subst = 3β,6β,16β-trihydroxy-9,19-cyclolanost-24-ene = SMILES C/C(C)=C\CC[C@@H](C)[C@H]4{16}[C@@H](O)C[C@@]5(C)C2C{6}[C@@H](O)C1[C@@](C)(C){3}[C@@H](O)CC[C@@]13C[C@@]23CC[C@]45C |
Show graphically |
Structure type: oligomer
; 805 [M+Na]+
C42H70O13
Compound class: triterpenoid glycoside
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