1 H NMR ( 400 MHz , CD 3 OD ) δ 9 . 19 ( s , 1 H ) , 9 . 03 - 8 . 87 ( br s , 1 H ) , 8 . 64 ( s , 1 H ) , 8 . 48 ( s , 1 H ) , 8 . 33 ( d , J = 8 . 6 Hz , 1 H ) , 7 . 90 ( d , J = 8 . 6 Hz , 1 H ) , 7 . 08 ( t , JHF = 56 . 0 Hz , 1 H ) , 5 . 51 - 5 . 31 ( br m , 1 H ) , 4 . 80 ( s , 2 H ) , 4 . 26 ( dd , J = 12 . 1 , 5 . 1 Hz , 1 H ) , 3 . 84 - 3 . 66 ( m , 2 H ) , 2 . 84 - 2 . 65 ( br m , 1 H ) , 2 . 55 ( s , 3 H ) , 2 . 52 - 2 . 35 ( br m , 1 H ) , 2 . 13 - 1 . 84 ( br m , 2 H ) , 1 . 31 ( d , J = 5 . 9 Hz , 3 H ) .