Dried plant material was ground and
extracted using the standard NCI extraction proptocol.The root
bark yielded 14.85 g of an organic solvent extract (N042029). A 2.61 g
portion of this material was dissolved in CH2Cl2−CH3OH (1:1) and
coated on 27 g of diol-bonded phase media using a rotary evaporator.
The medium was resuspended in hexane and evaporated to remove all
of the initial solvent to produce a dry flowable powder, which was
packed in a Buchner funnel over an equal amount of uncoated diol
medium, then eluted batchwise with 150 mL of hexane, CH2Cl2,
EtOAc, acetone, and CH3OH in succession. Evaporation gave 612 mg
of a CH2Cl2 fraction.