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A new triterpenoid, saponin hehuanoside A, was isolated together with the known triterpenoid saponins 2 , 3 , and 4 from the stem bark of Albizia julibrissin . With the help of chemical and spectral analyzes (IR, MS, 1D-NMR, and 2D-NMR), the structure of the new triterpenoid saponin was...
Two new ceramides 1 and 2 , and tetillapyrone 3 have been isolated from the Indian sponge Cinachyra cavernosa . The structures of 1 , 2 , and 3 were determined by spectroscopic and chemical analyses.
A new triterpenoid saponin, tenuifoside A, was isolated together with three known triterpenoid saponins 2 , 3 , and 4 from the roots of Polygala tenuifolia Willd. With the help of chemical and spectral analyses (IR, MS, 1D-NMR, and 2D-NMR), the structure of the new saponin was elucidated as 3- O...
Xylopyrine-C, a new 14-membered ring cyclopeptide alkaloid, has been isolated from the root bark of Zizyphus xylopyra together with a known alkaloid scutianine-C, and their structures were established by chemical and spectral evidences.
The effects of asimilobine, an aporphine isoquinoline alkaloid, on dopamine biosynthesis and l -DOPA-induced cytotoxicity in PC12 cells were investigated. Asimilobine at concentration ranges of 0.05-0.2 μM showed a significant inhibition of intracellular dopamine levels for 24 h in a...
Our previous studies indicated that oridonin, a diterpenoid isolated from Rabdosia rubescens , induced human melanoma A375-S2 cell apoptosis. In this study, we investigated whether the proapoptotic effect of oridonin on A375-S2 cells would depend on an interference with function of the...
Two new lanostanoid triterpenes, 23 S -hydroxy-3,7,11,15-tetraoxo-lanost-8,24 E -diene-26-oic acid ( 1 ), and 12β-acetoxy-3β-hydroxy-7,11,15,23-tetraoxo-lanost-8,20 E -diene-26-oic acid ( 16 ), together with 17 known compounds, were isolated from the fruit bodies of Ganoderma lucidum . Their...
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