5-Acetyl goniothalamin, a styryl dihydropyrone from Goniothalamus uvaroides

Abstract Two major compounds have been isolated and characterized from the roots of Goniothalamus uvaroides : goniothalamin, a biologically active styryl dihydropyrone, and its derivative, 5-acetyl goniothalamin. The isolation of goniothalamin has been previously reported from several Goniothalamus species collected from Peninsular Malaysia, Sabah and Sarawak. However, 5-acetyl goniothalamin has never been reported before. Structure elucidation of these compounds was carried out by spectroscopic methods.