“…1 H NMR (400 MHz, CDCl 3 ) d = 8.57 (dd, J = 7.2, 0.9 Hz, 1 H), 2 H),8.12 (s,1 H),7.66 (dd,J = 8.3,7.2 Hz,1 H),7.11 (d,J = 8.3 Hz, 1 H), 6.45 (s, 1 H), 4.46-4.38 (m, 2 H), 3.71 (dd, J = 10.6, 5.1 Hz, 2 H), 3.13 ppm (s, 6 H). 13 C NMR (100 MHz, CDCl 3 ) d = 165. 49, 164.97, 161.71, 157.60, 133.33, 131.94, 131.63, 130.65, 125.34, 125.07, 122.79, 114.34, 113.43, 44.97, 39.14, 38.79 ppm.…”