Amyloid-β, one of the hallmarks of Alzheimer's disease, is toxic to neurons and causes cell death in the brain. Oxidative stress is known to play an important role in Alzheimer's disease, and there is strong evidence linking oxidative stress to amyloid-β. The herbal plant "Tiew kon" (Cratoxylum
One (formosumone A, 1) new and fifteen (2-16) known phenolic compounds were isolated from the leaves of Cratoxylum formosum ssp. pruniflorumm, a substitute for the popular bitter nail tea ("Kuding Tea") generally used in Southeast Asia. Their structures were determined by extensive spectroscopic
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