1.3.1.32 maleylacetate reductase 1,4-dichlorobenzene degradation 1.3.1.119 chlorobenzene dihydrodiol dehydrogenase 1,4-dichlorobenzene degradation 1.14.12.26 chlorobenzene dioxygenase 1,4-dichlorobenzene degradation 3.1.1.45 carboxymethylenebutenolidase 1,4-dichlorobenzene degradation 5.5.1.11 dichloromuconate cycloisomerase 1,4-dichlorobenzene degradation