75657-39-5

Upstream product

• 75556-25-1 tomatoside B 
• 28154-24-7 C₄₁H₆₂O₁₂ 
• 41059-79-4 melongoside E 
• 107800-07-7 C₅₃H₇₈O₂₀ 

Downstream Products

• 10257-28-0 D-Galactose 
• 77-60-1 Neotigogenin 

Relevant academic research and scientific papers

MELONGOSIDE L AND MELONGOSIDE M, STEROIDAL SAPONINS FROM SOLANUM MELONGENA SEEDS

Two new steroidal saponins, melongoside L and melongoside M, have been isolated from a methanolic extract of Solanum melongena seeds and their structures elucidated.Key Word Index - Solanum melongena; Solanaceae; spirostanol glycosides; melongoside L; melongoside M.

STEROID GLYCOSIDES OF THE SEEDS OF Solanum melongena. STRUCTURES OF MELONGOSIDES A, B, E, F, AND H

Three chromatographically individual fractions, each containing tigogenin glycosides and diosgenin glycosides have been isolated by chromatography on a silica gel column from a methanolic extract of eggplant seeds.To separate the mixture of two difficultly separable glycosides into individual components, each fraction was acetylated and epoxidated, and the derivatives obtained were separated chromatographically.The tigogenin glycoside peracetates isolated were saponified, and the diosgenin epoxide glycoside acetates were de-epoxidated and saponified, to give the individual glycosides, melongosides A, B, E, F, and H.The complete chemical structure of each melongoside has been shown with the aid of acid hydrolysis, methylation, and periodate oxidation followed by a study of the products obtained.

TOMATOSIDE A FROM THE SEEDS OF Lycopersicum esculentum

Results are given which confirm the structure of the furostanol glycoside from tomato seeds forming wastes of the preserving industry.From a butanolic extract of the seeds of Lycopersicum esculentum Mill. we have isolated the furostanol glycoside tomatoside A (I) the structure of which has been established as 25(S)-5α-furostan-3β,22α,26-triol 26-O-β-D-glucopyranoside 3-O2)-O-β-D-glucopyranosyl-(1->4)-β-D-galactopyranoside>.At the same time, by enzymatic and chemical transformations three new spirostanol glycosides of neotigogenin have been obtained: tomatoside B (III), which is 25(S)-5α-spirostan-3β-ol 3-O-2)-β-D-galactopyranoside>, 25(S)-5α-spirostan-3β-ol 3-O-4)-β-D-galactopyranoside> (V), and 25(S)-5α-spirostan-3β-ol 3-O-β-D-galactopyranoside (IV).