Figure 1

Chemical structures of isoflavones in P. lobata flower. (a) kakkalide, (b) kakkalidone, (c) puerarin, (d) irisolidone, (e) 6"-O-xylosyl-glycitin, (f) tectoridin, (g) 6"-O-xylosyl-tectoridin, (h) genistin.