1H NMR (400 MHz, CDCl3) δ 7.41 (s, 1H), 1.43 (s, 9H), 1.29 (s, 9H). 13C{1H} NMR (101 MHz, CDCl3) δ 193.72, 155.81, 152.07, 133.69, 43.85, 31.14, 29.18 , 26.86. HRMS (ESI) (M+H)+ Calcd. for C12H10NO2: 210.1486, Found: 210.1485.