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  • Yellow crystal (83.4% yield); m.p.: 121-123 °C (lit. [58] 120-122 °C); UV-Vis (MeOH): 335-337 nm; IR (KBr, cm): 3458 (O-H), 2839-2985 (Ar C-H stretch), 1627 (C=O), 1556-1581 (C=C-C=O), 1350-1442 (C=C), 1213-1268 (C-O); H-NMR (600 MHz, CDCl) δ: 14.34 (s, 1H, OH, C-2′), 8.08 (d, 1H, H-β, J = 15.78 Hz), 7.96 (d, 1H, H-α, J = 15.78 Hz), 7.24 (d, 1H, H-6, J = 7.74 Hz), 7.08 (t, 1H, H-5, J = 8.04, 7.98 Hz), 6.95 (d, 1H, H-4, J = 8.04 Hz), 6.11 (d, 1H, H-3′, J = 2.10 Hz), 5.96 (d, 1H, H-5′, J = 2.10 Hz), 3.91 (s, 3H, OCH, C-6′), 3.90 (s, 3H, OCH, C-2), 3.89 (s, 3H, OCH, C-3), 3.84 (s, 3H, OCH, C-4′); C-NMR (150 MHz, CDCl) δ: 192.93 (C=O), 168.40 (C-2), 166.18 (C-6′), 162.55 (C-4′), 153.24 (C-3), 148.88 (C-1), 137.19 (C-2′), 129.79 (C-5), 128.95 (C-6), 124.12 (C-4), 119.80 (C-5′), 113.76 (C-3′), 106.47 (C-1′), 93.70 (C-β), 91.20 (C-α), 61.31 (OCH), 55.92 (OCH), 55.84 (OCH), 55.58 (OCH); EI-MS: m/z = 344 (60), 329 (7), 313 (100), 207 (30), 181 (24), 180 (87), 164 (70), 152 (37), 149 (55), 137 (51), 121 (52), 91 (25), 77 (21), 69 (13); (Molecular formula CHO). (E)-1-(2′-Hydroxy-4′,6′-dimethoxyphenyl)-3-(2,4,6-trimethoxyphenyl)prop-2-en-1-one (6).
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