长沙资材科技有限公司

¹H NMR (400 MHz, CDCl₃) δ 9.24 (s, 1H), 8.93 (s, 2H), 7.73 (s, 1H), 7.65 – 7.56 (m, 1H), 7.51 (d, J = 7.7 Hz, 1H), 7.39 (dd, J = 17.5, 9.1 Hz, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 157.95, 154.90, 136.35, 133.10, 132.06, 130.95, 130.04, 125.65, 123.55.