A new flavonolignan, sonyamandin (1), along with other known compounds was isolated from the aerial parts and seeds extracts of Silybum marianum (milk thistle) collected from Jordan. The known ones are ursolic acid (2), oleanolic acid (3), maslinic acid (4), oleic acid (5), β-sitosterol (6), β-, sitosteryl glucoside (7), apigenin (8), kaempferol-3-O-rhamnoside (9), apigenin-7-O-β-D-glycoside (10), isosylibin A (11), isosylibin B (12), and silybin B (13). The absolute stereochemistry of 1 was confirmed by 2D NMR and CD analysis.
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Hammad et al. (2024) studied this question.
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