Ervitrin (Isorhamnetin-3-O-rhamnosyl-rutinoside)

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Taxonomy: Physicochemical and Pharmacological Properties of Flavonoids – Flavons and Flavon-3-ols

Biological sources: Aerva lanata [1]

C₃₄H₄₂O₂₀: 770.7018

Mp: 185–188°C

[α]_D²² + 20.0° (c 2.6, H₂O)

UV: 256, 268, 355

¹H NMR (D₂O): 7.63 (1H, d, J = 9.0, H-5′), 7.38 (1H, d, J = 2.0, H-2′), 7.23 (1H, dd, J = 2.0, 9.0, H-6′), 6.76 (1H, d, J = 2.0, H-8), 6.68 (1H, d, J = 2.0, H-6), 5.82 (1H, d, J = 7.0, anomeric proton glucose, H-1″′), 5.35 (1H, d, J = 2.0, H anomeric proton of rhamnose, H-1″′), 4.42 (1H, d, J = 2, H-1″′), 3.10–4.30 (14H, m, protons of sugar party), 1.28 (3H, d J = 6.0, CH₃ rhamnose), 1.02 (3H, d, J = 6.0, CH₃ rhamnose) [1]