1 H NMR ( CD 3 OD ) δ : 7 . 22 ( s , 1 H ) , 7 . 23 - 7 . 35 ( m , 4 H ) , 7 . 48 - 7 . 51 ( m , 2 H ) , 4 . 38 - 4 . 51 ( m , 4 H ) , 3 . 70 ( s , 3 H ) , 2 . 40 ( s , 3 H ) , 2 . 15 - 2 . 30 ( m , 1 H ) , 1 . 62 - 1 . 84 ( m , 3 H ) , 1 . 14 - 1 . 40 ( m , 7 H ) .