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Bioactive polycyclic polyprenylated acylphloroglucinols from Hypericum maclarenii
Wen-Lan Meng1, Yu Zhou1, Fei-Fei Xiong1
1State Key Laboratory of Phytochemistry and Natural Medicines, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
Researchers identified seven new polycyclic polyprenylated acylphloroglucinols (PPAP) from Hypericum maclarenii. Some compounds showed moderate activity against human cancer cell lines.
Area of Science:
- Phytochemistry
- Natural Products Chemistry
- Pharmacology
Background:
- Hypericum species are known sources of bioactive compounds.
- Polycyclic polyprenylated acylphloroglucinols (PPAP) are a class of natural products with diverse biological activities.
- The phytochemical profile of Hypericum maclarenii remains largely unexplored.
Purpose of the Study:
- To conduct the first phytochemical investigation on the aerial parts of Hypericum maclarenii.
- To isolate and characterize new PPAP from this plant species.
- To evaluate the cytotoxic activities of the isolated compounds against human cancer cell lines.
Main Methods:
- Extraction and isolation of compounds from aerial parts of H. maclarenii.
- Structure elucidation using comprehensive spectroscopic techniques (NMR, MS).
- Determination of absolute configurations using electronic circular dichroism (ECD) calculations.
- In vitro cytotoxic activity assays against five human cancer cell lines.
Main Results:
- Seven new PPAP, designated hypermacones A–G (1–7), were characterized.
- Nine known analogues were also identified.
- Compounds 2 and 7 demonstrated moderate inhibitory activity against tested cancer cell lines.
Conclusions:
- This study represents the first phytochemical report on Hypericum maclarenii.
- New PPAP with potential cytotoxic properties were discovered.
- Further investigation into the mechanism of action of active compounds is warranted.
