Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
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By investigating the chemical constituents of the roots of Launaea sarmentosa, collected at Can Gio beach, Can Gio district, Ho Chi Minh city, nine compounds were isolated including amyrin acetate (1), -amyrin acetate (2), lupeol acetate (3), -taraksasterol acetate (4), luteolin (5), 4-allyl-2,6-dimethoxyphenol glucopyranoside (6), scorzoside (7), ixerisoside D (8) and 9-hydroxypinoresinol (9). To the best of our knowledge, all compounds were reported in other species, but this is the first time they were known in L. sarmentosa. Four compounds (1-4) from the n-hexane extract were identified by 4-dimethylaminopyridine-catalyzed benzoylation. Their chemical structures were elucidated by means of 1D and 2D NMR, HR-ESI-MS data analysis and compared with those reported in the literature.
Nội dung trích xuất từ tài liệu:
Chemical constituents of Launaea sarmentosa roots
