68422-00-4Relevant academic research and scientific papers
New transformation pathway and cytotoxic derivatives from the acid hydrolysis of timosaponin B III
Zhao, Yun-Fang,Zhang, Yu-Wei,Wang, Yinru,Morris-Natschke, Susan L.,Liu, Wei,Shang, Ting-Ting,Yin, Hong,Lee, Kuo-Hsiung,Huang, Xue-Feng
, p. 2755 - 2761 (2018/11/30)
Timosaponin B III is a major bioactive steroidal saponin isolated from Anemarrhena asphodeloides Bge. To potentially discover derivatives with better biological activity, timosaponin B III was structurally modified via acid hydrolysis to yield one new (2, timopregnane A I) C21 steroidal glycoside and seven known compounds. Their structures were elucidated on the basis of NMR spectroscopy and mass spectrometry. All eight compounds were evaluated for cytotoxic activity against MCF7, SW480, HepG2, and SGC7901 cell lines in vitro. As a result, compounds 6 and 7 showed significant activity (IC50 2.94–12.2 μM) against all tested cell lines. Structure–activity relationships of these compounds were investigated and the preliminary conclusions were provided. Moreover, a new transformation pathway was discovered in the acid hydrolysis of timosaponin B III for the first time.
TIMOSAPONIN COMPOUNDS
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Paragraph 00240, (2013/10/22)
Provided herein are timosaponin compounds of Frmula I, II, IIΙ, I', II' and IIΙ', pharmaceutical compositions comprising the coumpounds, and processes of preparation thereof. Also provided are uses of said timosaponin compounds for preparing medicament for the treatment of diseases associated with beta-amyloid in hosts or subjects in need thereof.
MELONGOSIDE L AND MELONGOSIDE M, STEROIDAL SAPONINS FROM SOLANUM MELONGENA SEEDS
Kintia, Pavel K.,Shvets, Stepan A.
, p. 197 - 198 (2007/10/02)
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
Kintya, P. K.,Shvets, S. A.
, p. 575 - 578 (2007/10/02)
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.
