“…1 H NMR (500 MHz, CDCl 3 ) δ ppm 9.02 (s, 3H), 8.51-8.48 (m, 6H), 7.76-7.67 (m, 6H), 7.62 (dd, J = 8.4, 2.0 Hz, 1H), 7.25-7.08 (m, 5H), 5.56 (s, 1H), 3.86 (s, 3H), 3.85 (s, 3H), 3.83 (s, 3H), 3.31 (dd, J = 13.3, 11.2 Hz, 2H), 2.79 (dd, J = 14.3, 3.6 Hz, 2H), 2.70-2.58 (m, 4H), 2.14-2.11 (m, 1H), 1.98-1.91 (m, 1H), 1.86-1.81 (m, 2H). 13…”