Medicinal Flowers. XXXIII. Anti-hyperlipidemic and Anti-hyperglycemic Effects of Chakasaponins I–III and Structure of Chakasaponin IV from Flower Buds of Chinese Tea Plant (<i>Camellia sinensis</i>)
Effects of principal saponins, chakasaponins I-III, from the flowerbuds of Camelliasinensis cultivated in Fujian province, China on plasma triglyceride (TG) and glucose levels in olive oil or sucrose-loaded mice were examined. Chakasaponins I-III at 50 and 100 mg/kg significantly inhibited increases in plasma TG and glucose levels. Furthermore, they prevented gastric emptying, suggesting that the
A n-butanol-soluble fraction of an ethanolic extract from the roots of Symplocos chinensis showed cytotoxic activity against several cancer cell lines. Bioassay-guided purification led to the isolation and characterization of eight new triterpenoidsaponins, symplocososides L-S (1-8). The structures of 1-8 were elucidated as glycosides based on oxygenated aglycons by spectroscopic and chemical methods
Ternstroenols A – E: Undescribed pentacyclic triterpenoids from the Australian rainforest plant Ternstroemia cherryi
作者:Ahilya Singh、Jason K. Cullen、Zara C. Bruce、Paul Reddell、Gerald Münch、Ritesh Raju
DOI:10.1016/j.phytochem.2020.112426
日期:2020.8
Chromatographic separation of the extracts of the Australian rainforest plant Ternstroemia cherryi led to the isolation of five undescribed barrigenol-like triterpenoids, ternstroenols A - E, from the fruits and three known ones from the leaves. Ternstroenols A - E represent a new form of structural diversity, being the first in its kind to incorporate a trans- 2, 4, 6- decatrienoyl moiety at C-22. The structures of the ternstroenols were assigned by detailed spectroscopic analysis, degradation and chemical derivatization. All compounds exhibited potent antiinflammatory activity in LPS and IFN-gamma activated RAW 264.7 macrophages, with IC50, values as low as 0.7 mu M. Despite the remarkable potency, high levels of unwanted cell growth inhibition was also observed, which prompted their cytotoxic evaluation in U87/U251 human glioblastoma cell lines.
Nozoe; Kinugasa, Nippon Kagaku Kaishi/Journal of the Chemical Society of Japan, 1935, vol. 56, p. 864,868