1 H NMR ( CDCl 3 ) δ 8 . 47 ( 1 H , m ) , 7 . 62 ( 0 . 5 H , d , J = 8 . 6 Hz ) , 7 . 58 ( 0 . 5 H , d , J = 7 . 9 Hz ) , 7 . 46 - 7 . 24 ( 3 H , m ) , 7 . 09 ( 1 H , m ) , 6 . 88 ( 0 . 5 H , br ) , 5 . 90 ( 0 . 5 H , br ) , 4 . 68 ( 0 . 5 H , dd , J = 15 . 2 , 6 . 6 Hz ) , 4 . 59 - 4 . 51 ( 1 H , m ) , 4 . 39 ( 0 . 5 H , dd , J = 15 . 8 , 5 . 2 Hz ) , 3 . 75 ( 0 . 5 H , br d , J = 2 . 6 Hz ) , 3 . 72 ( 0 . 5 H , br t , J = 7 . 3 Hz ) , 3 . 40 ( 0 . 5 H , br ) , 3 . 28 ( 0 . 5 H , dd , J = 16 . 4 , 6 . 0 Hz ) , 3 . 19 ( 0 . 5 H , br ) , 2 . 94 ( 0 . 5 H , m ) , 2 . 68 ( 0 . 5 H , dd , J = 16 . 4 , 2 . 6 Hz ) , 2 . 46 ( 0 . 5 H , dd , J = 15 . 8 , 9 . 2 Hz ) , 2 . 37 - 2 . 30 ( 0 . 5 H , m ) , 2 . 16 - 1 . 97 ( 3 H , m ) , 1 . 80 - 1 . 67 ( 0 . 5 H , m ) , 1 . 44 ( 4 . 5 H , s ) , 1 . 28 ( 4 . 5 H , s ) .