11,24-bis(chloromethyl)-2,5,8,15,18,21-hexaoxatricyclo[20.4.0.09,14]hexacosa-1(22),9(14),10,12,23,25-hexaene 、
11,12-bis(chloromethyl)-2,5,8,15,18,21-hexaoxatricyclo[20.4.0.09,14]hexacosa-1(26),9(14),10,12,22,24-hexaene 、
potassium permanganate 以53%的产率得到