BƯỚC ĐẦU NGHIÊN CỨU THÀNH PHẦN HÓA HỌC CỦA LÁ CÂY KHẾ (Averrhoa carambola L.)

Abstract

Objectives: To extract, isolate, and determine the chemical structure of some components from star fruit leaves (Averrhoa carambola L.) in Vietnam. Methods: Star fruit leaves were extracted using the cold percolation method in ethanol 96%. Pure compounds were isolated using the column chromatography method with suitable organic solvents. The chemical structure was determined by 1D and 2D-NMR spectra. Results: Three known compounds were identified from star fruit leaves including 1–O–linolenoyl–2–O–linoleoyl–3–O–β–D–galactopyranosyl–rac–glycerol (1), 6”–O–(icosa–9”,12”–dienoyl)–β–D–glucosyl–β–sitosterol (2), Carambolaside Q (3). In which, compounds 1 and 2 were isolated for the first time from the star fruit species and compound 3 was isolated for the first time from star fruit leaves. Conclusion: The results of this study have contributed to data on the chemical compositions of star fruit leaves; thereby, guiding studies on the pharmacological effects of leaves of this species.