(3,5-DIBROMO-4-HYDROXYPHENYL)(2,3-DIHYDRO-4H-PYRIDO[4,3-B][1,4]OXAZIN-4-YL)METHANONE (UR-1102/URC-1022) is currently under development for the management of hyperuricaemia in gout. It is a selective URAT1 inhibitor with Ki of 57 nM showing higher uricosuric effects than benzbromarone in monkeys with potentially lower mitochondrial toxicity which is supposed to be related to hepatotoxicity. There is also a probable inhibition of OAT1 and OAT3. UR-1102, which is derived from the chemical structure of benzbromarone, was designed to not only improve URAT1 selectivity and solubility but also to avoid the hepatic toxicity concern of benzbromarone, which is known to be associated with hepatic injury and to have the potential to cause fulminant hepatitis in humans. The results of two phase II trials presented at the 2017 ACR meeting suggested a high potency for reducing SU levels with a good safety profile on a short follow-up. No phase III trial has been registered so far.

Vincanol is an alkaloid derived from vinca. The drug possesses hypotensive and vasodilating properties which justify its use in cardiovascular therapy. In vitro studies in rats demonstrated that vincanol may act by blocking voltage-gated Na+ channels.

Kynurenine is a metabolite of the amino acid L-tryptophan used in the production of niacin. Kynurenine is synthesized by the enzyme tryptophan dioxygenase, which is made primarily but not exclusively in the liver, and indoleamine 2,3-dioxygenase, which is made in many tissues in response to immune activation. Kynurenine and its further breakdown products carry out diverse biological functions, including dilating blood vessels during inflammation and regulating the immune response. Evidence suggests that increased kynurenine production may precipitate depressive symptoms associated with interferon treatment for hepatitis C. Cognitive deficits in schizophrenia are associated with imbalances in the enzymes that break down kynurenine. Kynurenine production is increased in Alzheimer's disease and cardiovascular disease where its metabolites are associated with cognitive deficits and depressive symptoms.

LABRADIMIL, a synthetic bradykinin analog, is a potent bradykinin B2 receptor agonist. It increases vascular permeability by the activation of B2 receptors on the vascular endothelium. It also selectively increases uptake of molecular tracers in brain tumors.