“…4′-Methyl-α,β-dihydrochalcone (1a), white solid, mp 61–63 °C (lit. 24 61–63 °C); 1 H NMR (600 MHz, CDCl 3 ): δ 7.90–7.83 (2H, m, H-2′, H-6′, AA′BB′), 7.33–7.24 (6H, m, H-2, H-3, H-5, H-6, H-3′, H-5′), 7.24–7.19 (1H, m, H-4), 3.32–3.25 (2H, m, H-α), 3.11–3.02 (2H, m, H-β), 2.41 (3H, s, C-4′-C
); 13 C NMR (150 MHz, CDCl 3 ): δ 199.00 (C̲ O), 143.94 (C-4′), 141.52 (C-1), 134.51 (C-1′), 129.39 (C-2′, C-6′), 128.63 (C-3, C-5), 128.54 (C-2, C-6), 128.28 (C-3′, C-5′), 126.21 (C-4), 40.47 (C-α), 30.34 (C-β), 21.76 (C-4′-C̲H 3 ); HR ESI-MS m / z calculated for C 16 H 17 O [M + H] + 225.1274, found [M + H] + 225.1282.…”