obsolete cis-3,4-phenanthrenedihydrodiol-4-carboxylate dehydrogenase activity (obsolete GO:0034924)
OBSOLETE. Catalysis of the reaction: cis-3,4-phenanthrenedihydrodiol-4-carboxylate = 3,4-dihydroxyphenanthrene + H+ + 2 e- + CO2.