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Published on: August 16, 2018
Sesquiterpenoids and norterpenoids from Vitex negundo.
Cheng-Jian Zheng1, Jiang Pu, Hong Zhang
1Department of Pharmacognosy, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, PR China.
Fitoterapia
|October 5, 2011
Summary
Researchers isolated four new compounds from Vitex negundo seeds, including a sesquiterpenoid, a diterpenoid, and two triterpenoids. Two compounds showed significant cytotoxic activity against cancer cell lines.
Area of Science:
- Natural Product Chemistry
- Phytochemistry
- Medicinal Chemistry
Background:
- Vitex negundo, commonly known as the five-leaved chaste tree, is a medicinal plant with a long history of traditional use.
- The chemical constituents of Vitex negundo seeds have not been fully explored, particularly regarding novel bioactive compounds.
Purpose of the Study:
- To isolate and characterize new chemical entities from the seeds of Vitex negundo.
- To evaluate the cytotoxic potential of the isolated compounds against selected human cancer cell lines.
Main Methods:
- Seeds of Vitex negundo were subjected to extensive chromatographic separation.
- Structures of isolated compounds were elucidated using comprehensive spectroscopic techniques, including Nuclear Magnetic Resonance (NMR), Infrared (IR), and Mass Spectrometry (MS).
- Cytotoxicity was assessed using standard cell-based assays, determining half-maximal inhibitory concentration (IC50) values.
Main Results:
- Four new compounds were identified: a furan-containing sesquiterpenoid (negunfurol, 1), a norlabdane-type diterpenoid (negundoal, 2), and two norursane-type triterpenoids (negundonorins A and B, 3 and 4).
- Two known compounds, 3-formyl-4,5-dimethyl-8-oxo-5H-6,7-dihydronaphtho[2,3-b]furan (5) and 3-epi-corosolic acid (6), were also isolated.
- Negundonorin A (3) exhibited potent cytotoxicity against the ZR-75-30 cell line (IC50 = 0.56 ± 0.19 μg/mL).
- Negunfurol (1) demonstrated significant activity against the HL-60 cell line (IC50 = 0.94 ± 0.26 μg/mL).
Conclusions:
- The chemical investigation of Vitex negundo seeds led to the discovery of novel sesquiterpenoid, diterpenoid, and triterpenoid compounds.
- The isolated compounds, particularly negundonorin A and negunfurol, possess significant cytotoxic properties, highlighting their potential as leads for anticancer drug development.
- Further research into the mechanism of action and structure-activity relationships of these compounds is warranted.
