熔点: 98.8-101.5 oC,1H NMR (400 MHz, CDCl3) δ 8.30, 8.17 (d, J = 7.8 Hz, 1H) , 7.76 (d, J = 7.8 Hz, 1H) , 7.55 (d, J = 8.0 Hz, 1H), 7.31 (d, J = 7.8 Hz, 1H), 7.09 (d, J = 7.8 Hz, 1H), 7.04 (d, J = 8.0 Hz, 2H), 6.97 (d, J = 8.0 Hz, 1H), 3.97 (s, 3H), 3.80 (s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 181.39, 158.99, 157.30, 156.55 , 139.38, 138.20, 133.75, 131.08, 129.24, 128.14, 126.54, 120.80, 120.32, 119.02, 111.97, 110.46, 55.94, 55.34. HRMS (ESI) (M+H)+ Calcd. for C18H16NO4: 310.1073, Found: 310.1071.