1H NMR (400 MHz, CDCl3) δ 7.53 – 7.45 (m, 4H), 7.43 – 7.29 (m, 6H), 3.65 (t, J = 7.3 Hz, 2H), 1.73 – 1.64 (m, 2H), 1.38 – 1.24 (m, 10H), 0.88 (t, J = 6.6 Hz, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 170.8, 136.1, 129.9, 129.7, 128.7, 128.5, 38.5, 31.8, 29.1, 28.6, 26.8, 22.6, 14.1.