Dillenia suffruticosa (L.) leaves, commonly known as "Simpur Air", possess therapeutic potential as an anti-hyperuricemic agent. The plant contains secondary metabolites such as alkaloids, terpenoids, flavonoids, and fatty acid esters, which have been shown to inhibit xanthine oxidase (XO), an enzyme associated with hyperuricemia. This study aimed to evaluate the XO inhibitory effect of the eth…