1 H - NMR . δ ( CDCl 3 ) : 7 . 63 ( d , 1 H , J = 7 . 5 Hz ) , 7 . 57 ( d , 1 H , J = 8 . 5 Hz ) , 7 . 46 ( d , 2 H , J = 8 . 5 Hz ) , 7 . 39 ( d , 1 H , J = 7 . 5 Hz ) , 7 . 31 ( td , 1 H , J = 7 . 5 Hz , 1 . 5 Hz ) , 7 . 21 - 7 . 28 ( m , 4 H ) , 7 . 07 - 7 . 18 ( m , 6 H ) , 7 . 02 - 7 . 06 ( m , 1 H ) , 7 . 01 ( s , 1 H ) , 2 . 44 - 2 . 57 ( brm , 3 H ) , 1 . 89 - 1 . 96 ( m , 6 H ) , 1 . 81 - 1 . 88 ( m , 6 H ) , 1 . 71 - 1 . 78 ( m , 3 H ) , 1 . 34 - 1 . 53 ( m , 18 H ) , 1 . 20 - 1 . 32 ( m , 3 H ) .