1 H NMR ( 300 MHz , CDCl 3 ) : 6 . 55 ( t , J = 1 . 2 Hz , 1 H ) , 5 . 83 ( m , 1 H , ) , 5 . 05 ( m , 1 H ) , 4 . 99 ( m , 2 H ) , 3 . 96 ( m , 4 H ) , 3 . 43 ( dd , J = 9 . 6 , 17 . 7 Hz , 1 H ) , 3 . 25 ( t , J = 9 . 6 Hz , 1 H ) , 2 . 36 ( m , 1 H ) , 2 . 25 ( m , 1 H ) , 2 . 11 ( ddd , J = 8 . 4 , 11 . 4 , 19 . 8 Hz , 1 H ) , 1 . 89 ( m , 1 H ) 13 C NMR ( 75 MHz , CDCl 3 ) : δ 177 . 5 , 141 . 3 , 139 . 9 , 114 . 7 , 106 . 6 , 65 . 6 , 64 . 2 , 50 . 6 , 45 . 0 , 40 . 2 , 38 . 9 , 19 . 9 FT - IR ( 2930 , 2357 , 1776 , 1671 , 1608 , 1342 cm ? 1 ) LRMS calcd for for C 12 H 11 IO 3 : 329 . 98