The root of Caragana sinica (Buc' hoz)Rehd' is a Chinese folk medicine which is said to be useful for thetreatment of asthenia syndrome,vascular hypertension, leukorrhagia, arthrodynia, and as antiinflammatory agent. In the course of our search for inhibitors of protein kinase C from Chinese herbs,chemical constituentsof the root of C. sinica was examined. Frorn ethanol extract of this crude drug,five isof1avones were isolatedand identified as flemichapparnin B, formononetin, pseudobaptigenin, 5-hydroxy-7, 4'-dimethoxy isoflavone,and 5-hydroxy-7-methoxy-3', 4' -methylenedioxy isoflavone.