obsolete 3-hydroxy-2-naphthoate 2,3-dioxygenase activity (obsolete GO:0034803)
OBSOLETE. Catalysis of the reaction: 3-hydroxy-2-naphthoate + O2 = (3E)-3-[(6Z)-6-(carboxymethylene)cyclohexa-2,4-dien-1-ylidene]-2-oxopropanate.