Xanthine oxidase-IN-5, a powerful and orally active inhibitor of xanthine oxidase (XO), exhibits an IC50 value of 0.70 μM. It possesses favorable drug-like characteristics, with ligand efficiency (LE) and lipophilic ligand efficiency (LLE) values of 0.33 and 3.41, respectively. Moreover, Xanthine oxidase-IN-5 showcases significant hypouricemic effects in a hyperuricemic rat model [1].
Xanthine oxidoreductase-IN-2 (Compound IVa) is a potent inhibitor of xanthine oxidoreductase (XOR) with an IC50 value of 7.2 nM. Notably, Xanthine oxidoreductase-IN-2 demonstrates hypouricemic effects in mice, as evidenced by [1].