R04327 5-hydroxy-1,4-naphthoquinone,water:oxygen oxidoreductase (3-hydroxylating); 2 Juglone + Oxygen <=> 2 3,5-Dihydroxy-1,4-naphthoquinone
R11495 naphthalene-1,2,4,8-tetrol hydro-lyase (juglone-forming); Juglone + H2O <=> Naphthalene-1,2,4,8-tetrol