Dried flowers of Vaccinium bracteatum THUNB. were extracted with benzene and methanol. From the benzene extract were isolated hydrocarbons, aldehydes, friedelin, alcohols, ursolic acid (containing a small quantity of oleanolic acid), and maslinic acid (containing a small quantity of 2α-hydroxyursolic acid). From the methanol extract were obtained ursolic acid, p-coumaric acid, β-sitosteryl β-D-glucoside, mixture of fructose and glucose, orientin, isoorientin, shikimic acid, monotropein, and a new iridoid glycoside named vaccinoside (I). The structure of I was elucidated as 10-(p-hydroxy-trans-cinnamoyl)monotropein through the scheme shown in Fig. 1.