1 H - NMR . δ ( CDCl 3 ) : 7 . 63 ( d , 1 H , J = 7 . 5 Hz ) , 7 . 57 ( d , 1 H , J = 7 . 5 Hz ) , 7 . 51 ( d , 2 H , J = 8 . 0 Hz ) , 7 . 46 ( d , 2 H , J = 7 . 5 Hz ) , 7 . 38 ( d , 1 H , J = 7 . 5 Hz ) , 7 . 30 ( td , 1 H , J = 7 . 0 Hz , 1 . 5 Hz ) , 7 . 20 - 7 . 28 ( m , 6 H ) , 7 . 01 - 7 . 18 ( m , 7 H ) , 2 . 43 - 2 . 57 ( brm , 2 H ) , 1 . 81 - 1 . 96 ( m , 8 H ) , 1 . 71 - 1 . 79 ( brm , 2 H ) , 1 . 34 - 1 . 50 ( brm , 14 H ) , 1 . 20 - 1 . 32 ( brm , 2 H ) .