Ro 61-8048 is a potent and competitive kynurenine 3-hydroxylase inhibitor (Ki = 4.8 nM, IC50 = 37 nM).

GSK180 (GSK-180) is a potent and specific inhibitor of kynurenine-3-monooxygenase (KMO) with IC50 of 6 nM, shows negligible activity against other enzymes on the tryptophan pathway; inhibits the convertion of kynurenine to 3-hydroxykynurenine with IC50 of 2.0 uM in cell-based assays; prevents multiple organ failure in rodent models of acute pancreatitis.

A novel potent kynurenine-3-monooxygenase (KMO) inhibitor with IC50 of 4.5 nM.

A novel potent kynurenine-3-monooxygenase (KMO) inhibitor with IC50 of 2.3 nM and 0.7 nM for human KMO and Pf-KMO, respectively.