1,3,7-Trimethyluric acid is a purine alkaloid that occurs as a minor metabolite of caffeine in humans.?As an antioxidant, it has shown an ability to scavenge hydroxyl radicals as well as protective potential against lipid peroxidation in erythrocyte membranes.

Adenosine dialdehyde is a purine nucleoside analogue. Adenosine dialdehyde is a potent inhibitor of S-Adenosylhomocysteine hydrolase (SAHH) (Ki=3.3 nM). Adenosine Dialdehyde exhibits potent anti-tumor activity in vivo.

Narchinol B (Compound 4) is a sesquiter penoid compound. Narchinol B has anti-inflammatory effects. Narchinol B works by inhibiting proinflammatory mediators, including prostaglandin E2 (PGE2), inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2) proteins,as well as proinflammatory cytokines, such as interleukin-1b, IL-6, and tumor necrosis factor-α (TNF-α). Narchinol B significantly inhibits LPS-induced overproduction of NO in BV2 cells (IC50=2.43 μM).