Crystal structure of kakkalidone, C23H24O11

X.-Q. Zhang, Z.-T. Zhang, X.-L. Zhang
2006 Zeitschrift für Kristallographie - New Crystal Structures  
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-soluble
more » ... he ethanol-soluble portion of the extraction mixture was dried on a rotary evaporator under reduced pressure and subjected to silica-gel column chromatography (6 ×100 cm). Kakkalidone was eluted from the column with CHCl3/CH3OH (6:1, v/v) and colorless crystals suitable for X-ray diffraction analysis were obtained by slow evaporation from 95 % ethanol solution after two weeks at room temperature.
doi:10.1524/ncrs.2006.221.1.80 fatcat:7zsy7tspgngprck2l5z7w3s6ue