Three new saponins, melongosides N, O and P, have been isolated from the methanolic extract of seeds of Solanum melongena and their structures elucidated. Melongoside N is 3-O-[β-D-glucopyranosy l-(1→2)-β-D-glucopyranosyl]-26-O-(β-D-glucopyranosyl)-(25R)-5α-furostan-3β,22 α,26-triol, whereas melongoside O is 3-O-[β-D-glucopyranosyl-(1→2)β-D-glucopyranosyl]- 26-O-(β-D-glucopyranosyl)-(25R)-furost-5-en-3β,22α,26-triol and melongoside P is 3-O- [β-D-glucopyranosyl-(1→2)]-[α-L-rhamnopyranosyl-(1→3)]-β-D-glucopyranosyl)-26-O- (β-D-glucopyranosyl)-(25 R)-5α-furostan-3β,22α,26-triol.
Solanaceae, furostanol glycosides, Solanum melongena, melongoside N, melongoside O, melongoside P
Publication DOI: 10.1016/S0031-9422(00)81067-5Journal NLM ID: 0151434Publisher: Elsevier
Institutions: Department of Plant Genetics, Academy of Sciences of the Moldavian S.S.R., Kishinev, U.S.S.R.
Methods: IR, partial acid hydrolysis, TLC, acid hydrolysis, GC, MS, methanolysis, enzymatic digestion, methylation analysis
Found