1 H NMR ( 400 MHz , 아 세토 니트릴 - d 3 ) δ 9 . 76 ( s , 1 H ) , 8 . 64 ( s , 1 H ) , 8 . 62 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 58 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 00 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 77 ( s , 1 H ) , 7 . 42 ( s , 1 H ) , 7 . 16 ( d , J = 5 . 1 Hz , 1 H ) , 4 . 86 ( d , J = 6 . 5 Hz , 2 H ) , 4 . 72 ( d , J = 6 . 5 Hz , 2 H ) , 1 . 83 ( s , 3 H ) , 1 . 27 ( d , J = 2 . 0 Hz , 6 H ) .