Suggested Reaction 1.3.3.-

Left

cis-2,3-Dihydrodiol 1,1,1-Trichloro-2,2-bis(4'-chlorophenyl)ethane
+O2

Right

2,3-Dihydroxy 1,1,1-Trichloro-2,2-bis(4'-chlorophenyl)ethane
+H2O2

[BiSSCat | GREP ]