Abstract
From the wood of n-hexane extract of Willughbeia cochinchinensis, perform column chromatography on a normal phase silica gel with n-hexane: ethyl acetate obtained in 8 fractions. From GD-D and GD-F fractions, multiple column chromatography on silica gel was performed in combination with normal and reverse phase thin-layer chromatography, four triterpene compounds as epifriedelanol (1), taraxeryl acetate (2), ambolic acid (3) and α- amyrin (4) were isolated. Their chemical structures were determined by spectrocopic methods as well as comparing with data in the literature. These compounds were isolated for the first time from Willughbeia cochinchinensis.
Highlights
From the wood of n-hexane extract of Willughbeia cochinchinensis, perform column chromatography on a normal phase silica gel with n-hexane: ethyl acetate obtained in 8 fractions
From GD-D and GD-F fractions, multiple column chromatography on silica gel was performed in combination with normal and reverse phase thin-layer chromatography, four triterpene compounds as epifriedelanol (1), taraxeryl acetate (2), ambolic acid (3) and αamyrin (4) were isolated
Their chemical structures were determined by spectrocopic methods as well as comparing with data in the literature
Summary
Từ cao n-hexane của thân cây Guồi đỏ (Willughbeia cochinchinensis), thực hiện sắc ký cột trên silica gel pha thường với hệ dung môi nhexane : ethyl acetate thu được 8 phân đoạn cao. Từ phân đoạn cao GD-D và GD-F, thực hiện sắc ký cột nhiều lần trên silica gel pha thường kết hợp với sắc ký bản mỏng điều chế pha thường và pha đảo, đã phân lập được bốn hợp chất triterpene là epifriedelanol (1), taraxeryl acetate (2), ambolic acid (3) và α-amyrin (4). Cấu trúc hóa học các hợp chất này được xác định bằng các phương pháp phổ nghiệm kết hợp với so sánh tài liệu tham khảo. Đây là các hợp chất lần đầu tiên được phân lập từ loài cây này
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