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Structures of chemical constituents in the ethyl acetate extract of B. dracunculifolia. (1) caffeic acid; (2) p-coumaric acid; (3) aromadendrin-4-O-methyl ether; (4) 3-prenyl-p-coumaric acid (drupanin); (5) 3,5-diprenyl p-coumaric acid (artepillin C); (6) baccharin.
