Dihydronaftazone-d4 O-β-D-Glucuronide is labelled Dihydronaftazone O-β-D-Glucuronide (D450330) which is a metabolite of Naftazone (N359270) which is a novel anti-anflammatory agent as well as an anti-proliferative agent due to its 1,2-napthoquinone substructure.