熔点: 104.8-107.5 oC,1H NMR (400 MHz, CDCl3) δ 8.50 (d, J = 7.6 Hz, 2H), 8.10 (s, 1H), 7.73 (d, J = 6.8 Hz, 2H), 7.35 (d, J = 8.0 Hz, 2H), 7.25 (d, J = 5.2 Hz, 2H), 2.47 (s, 3H), 2.40(s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 178.39, 157.61, 145.07, 142.65, 138.77, 135.65, 132.53, 131.17, 129.54, 129.22, 127.21, 125.74, 21.82, 21.33. HRMS (ESI) (M+H)+ Calcd. for C18H16NO2: 278.1176, Found: 278.1175.