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C 23H24O11, monoclinic, P1211 (no. 4), a = 6.081(3) Å, b = 7.838(3) Å, c = 22.60(1) Å, b = 92.127(7)°, V = 1076.4 Å 3 , Z = 2, R gt(F) = 0.072, wRref(F 2 ) = 0.226, T = 298 K. Source of material The flowers of Pueraia lobata were collected from the Taibai Mountains of Shaanxi province in July, 2005. All commercially available reagents were used as supplied. The dry powders (100 g) of the flowers of Pueraia lobata were refluxed for 1 h with 70 % ethanol (700 mL) three times. The ethanol-solubledoi:10.1524/ncrs.2006.221.1.80 fatcat:7zsy7tspgngprck2l5z7w3s6ue