22425-81-6Relevant articles and documents
TRITERPENOID SAPONINS FROM LEAVES OF CASTANOSPERMUM AUSTRALE
Ahmad, Viqar Uddin,Ahmed, Waseemuddin,Usmanghani, Khan
, p. 2805 - 2808 (1992)
An investigation of the leaves of Castanospermum australe afforded one new and another known triterpenoid saponin as their methyl esters.The structures of these two compounds were elucidated on the basis of chemical and spectral data as 2β,23-dihydroxy-3-O-(4-deoxy-β-L-threo-hex-4-enopyranosiduronic acid)-olean-12-en-28-oic acid dimethyl ester and medicagenic acid 3-O-β-D-glucoside dimethyl ester. Key words: Castanospermum australe; Fabaceae; leaves; triterpenoid saponins.
New triterpenic saponins from the aerial parts of Medicago arabica (L.) Huds
Tava, Aldo,Mella, Mariella,Avato, Pinarosa,Biazzi, Elisa,Pecetti, Luciano,Bialy, Zbigniew,Jurzysta, Marian
experimental part, p. 2826 - 2835 (2010/06/11)
The reinvestigation of saponin composition from Medicago arabica from Italy allowed the detection of nineteen (1-19) saponins. All of them were purified by reverse-phase chromatography and their structures elucidated by spectroscopic and spectrometric (1D and 2D NMR; ESI-MS/MS) and chemical methods. Fourteen were known saponins, previously found in other plants including other Medicago species. They have been identified as glycosides of oleanolic acid, 2β,3β-dihydroxyolean-12-en-28-oic acid, hederagenin, bayogenin and soyasapogenol B. Five saponins, identified as 3-O-[-α-L- arabinopyranosyl(1→2)-β-D-glucuronopyranosyl]-30-O-β-D- glucopyranosyl 2β,3β,30-trihydroxyolean-12-en-28-oic acid (1), 3-O-[α-L-arabinopyranosyl(1→2)-β-D-glucuronopyranosyl] -30-O-[β-D-glucopyranosyl]3β,30-dihydroxyolean-12-en-28-oic acid (2), 3-O-|β-D-glucuronopyranosyl]-30-O-[α-L-arabinopyranosyl(1→2) -β-D-glucopyranosyl] 2β,3β,30-trihydroxyolean-12-en-28-oic acid (3), 3-O-[β-D-glucuronopyranosyl]-30-O-[α-L- arabinopyranosyl(1→2)-β-D-glucopyranosyl] 3β,30-dihydroxyolean- 12-en-28-oic acid (4) and 3-O-[β-D-glucuronopyranosyl]-30-O-[β-D- glucopyranosyl] 2β,3β,30-trihydroxyolean-12-en-28-oic acid (5), are reported here as new natural compounds. These new saponins, possessing a hydroxy group at the 30-methyl position of the triterpenic skeleton, have never been previously found in the genus Medicago.
Triterpenoid saponins from Aster batangensis
Shao Yu,Zhou Bing-Nan,Lin Long-Ze,Cordell
, p. 927 - 933 (2007/10/02)
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