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Genistin (Genistein-7-O-β-D-glucoside)

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Taxonomy: Physicochemical and Pharmacological Properties of Flavonoids - Isoflavonoids

Biological sources: Thermopsis alterniflora [1-4], Th. dolichocarpa [4, 5], Th. lanceolata [1], Th. lupinoides [6]

C21H20O10: 432.3875

Mp: 253-255°C

[α]D−22.3° (Py) [1]

UV: 263, 329; +CH3COONa: 262, 330; +AlCl3: 273, 374; +CH3ONa: 272, 355 [3]

IR: 3520-3250 (OH), 1660 (C = O γ-pyrone), 1620, 1675, 1515 (C = C aromatic), 1120-1035 (C-O glucosides) [3]

1 H NMR (Py-d5): 3.90-4.60 (6H, m, proton of sugar part), 5.65 (1H, d, J = 6.2, anomeric proton of glucose, H-1″), 6.71 (1H, d, J = 2.5, H-6), 6.91 (1H, d, J = 2.5, H-8), 7.16 (2H, d, J = 8.0,