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Abstract
Phytochemical investigation of the methanol extract of Euchresta formosana resulted in the isolation of thirty-four compounds. Compounds 1 , 3-12 , 15 , 27 , 29 and 32-24 were isolated from this species for the first time. These compounds were identified by spectral analyses and tested for antiplatelet aggregation and anti-HIV activities. Among these compounds, tectorigenin ( 1 ), 3',4',5-trihydroxyisoflavone ( 3 ), and euchretin F ( 19 ) were the most effective antiplatelet aggregation compounds; they inhibited both AA- (arachidonic acid) and collagen-induced platelet aggregation. Meanwhile, flemiphyllin ( 8 ), quercetin ( 13 ), euchretin M ( 23 ), and formosanatin C ( 26 ) inhibited HIV replication in H9 lymphocyte cells.
