1 H NMR ( 400 MHz , MeOD ) δ 7 . 96 - 7 . 86 ( m , 2 H ) , 7 . 71 ( dd , J = 1 . 8 , 0 . 7 Hz , 1 H ) , 7 . 56 - 7 . 44 ( m , 3 H ) , 7 . 43 - 7 . 34 ( m , 2 H ) , 7 . 22 ( d , J = 1 . 0 Hz , 1 H ) , 7 . 04 - 6 . 89 ( m , 3 H ) , 6 . 62 ( ddd , J = 7 . 7 , 2 . 2 , 1 . 3 Hz , 1 H ) .