Structurally diverse triterpenoid alkaloids from Buxus rugulosa

Area of Science:

• Natural Product Chemistry
• Medicinal Chemistry
• Pharmacology

Background:

• Buxus rugulosa is a plant species known to produce bioactive alkaloids.
• Triterpenoid alkaloids represent a class of natural products with diverse pharmacological activities.
• Identifying novel compounds from natural sources is crucial for drug discovery.

Purpose of the Study:

• To isolate and characterize new nortriterpenoid alkaloids from Buxus rugulosa.
• To evaluate the cytotoxic potential of isolated compounds against cancer cell lines.

Main Methods:

• Phytochemical investigation of Buxus rugulosa twigs and leaves.
• Structure elucidation using Nuclear Magnetic Resonance (NMR) and Mass Spectrometry (MS).
• In vitro cytotoxicity assays using MCF-7 cell lines.

Main Results:

• Four new nortriterpenoid alkaloids, buxrugulines E-H (1-4), were identified.
• Five known nortriterpenoid alkaloids (5-9) were also isolated.
• Compounds 5, 6, and 8 demonstrated significant in vitro cytotoxicity against MCF-7 cells, with IC50 values between 6.70 and 11.00 μM.

Conclusions:

• Buxus rugulosa is a valuable source of structurally diverse nortriterpenoid alkaloids.
• Compounds 5, 6, and 8 possess potent cytotoxic properties, warranting further investigation for anticancer drug development.
• The isolated compounds contribute to the understanding of Buxus alkaloid chemistry and bioactivity.