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Phragmalin limonoids from Chukrasia tabularis var. velutina
Xue-Lian Chen1, Hai-Li Liu, Yue-Wei Guo
1State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, P. R. China.
Planta Medica
|December 3, 2011
Summary
Researchers identified two novel phragmalin limonoids, velutinalides A and B, and a related compound from Chukrasia tabularis var. velutina leaves. These compounds possess a unique δ-lactone ring structure.
Area of Science:
- Natural Product Chemistry
- Organic Chemistry
- Phytochemistry
Background:
- Chukrasia tabularis var. velutina is a plant source of bioactive compounds.
- Limonoids are a class of terpenoids with diverse biological activities.
- Phragmalin limonoids represent a specific subclass with unique structural features.
Purpose of the Study:
- To isolate and characterize new limonoid compounds from Chukrasia tabularis var. velutina.
- To elucidate the chemical structures of novel natural products.
- To investigate structurally related compounds from the same plant source.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation through extensive spectroscopic data analysis (NMR, MS).
- Comparison of spectral data with known related compounds.
Main Results:
- Isolation of two new C-15-acyl phragmalin limonoids, velutinalides A and B.
- Identification of a new structurally related natural product, R310B8.
- Characterization of a distinctive C-16/C-30 δ-lactone ring in velutinalides A and B.
Conclusions:
- Velutinalides A and B are novel phragmalin limonoids with a unique δ-lactone ring.
- R310B8 represents a new related natural product from this plant.
- The study expands the knowledge of limonoid diversity in Chukrasia tabularis.
