obsolete 1,2-dihydroxy-5,6,7,8-tetrahydronaphthalene extradiol dioxygenase activity (obsolete GO:0034827)
OBSOLETE. Catalysis of the reaction: 1,2-dihydroxy-5,6,7,8-tetrahydronaphthalene + O2 = 4-(2-oxocyclohexyl)-2-hydroxy-buta-2,4-dienoate + H+.