熔点: 98.8-101.5 oC,1H NMR (400 MHz, CDCl3) δ 8.64 (d, J = 7.6 Hz, 2H), 8.04 (s, 1H), 7.78 (d, J = 7.6 Hz, 2H), 7.02 (d, J = 7.6 Hz, 2H), 6.97 (d, J = 7.6 Hz, 2H), 3.91 (s, 3H), 3.85 (s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 177.14, 164.40, 160.06, 157.70, 142.32, 134.91, 133.58, 131.68, 127.19, 122.74, 114.30, 113.83, 55.55, 55.35. HRMS (ESI) (M+H)+ Calcd. for C18H16NO4: 310.1074, Found: 310.1072.