1 H NMR ( 400 MHz , CD 3 OD ) δ 9 . 28 ( s , 1 H ) , 8 . 98 - 8 . 81 ( br s , 1 H ) , 8 . 34 ( d , J = 8 . 6 Hz , 1 H ) , 7 . 92 ( d , J = 9 . 0 Hz , 1 H ) , 7 . 48 ( s , 1 H ) , 7 . 30 ( s , 1 H ) , 7 . 08 ( t , JHF = 56 . 0 Hz , 1 H ) , 5 . 82 ( s , 2 H ) , 5 . 44 - 5 . 29 ( br m , 1 H ) , 4 . 23 ( dd , J = 11 . 7 , 5 . 1 Hz , 1 H ) , 3 . 81 - 3 . 66 ( m , 2 H ) , 3 . 71 ( s , 3 H ) , 2 . 76 - 2 . 55 ( br m , 1 H ) , 2 . 47 - 2 . 24 ( br m , 1 H ) , 1 . 90 - 1 . 56 ( br m , 2 H ) , 1 . 28 ( d , J = 6 . 3 Hz , 3 H ) .