TUG-469

1H NMR (CDCl3) δ 7.37-7.21 (m, 8H), 7.01 (d, J = 8.6 Hz, 2H), 6.59 (d, J = 8.4 Hz, 2H), 4.35 (s, 2H), 2.82 (t, J = 7.8 Hz, 2H), 2.63 (t, J = 8.1 Hz, 2H), 2.22 (s, 3H);

13C NMR (CDCl3) δ 179.1, 146.7, 142.4, 141.8, 139.4, 135.5, 130.5, 129.9, 129.4, 129.2, 128.5, 128.5, 128.2, 127.4, 126.1, 125.9, 113.3, 48.7, 36.2, 30.0, 20.6;