sample of 263 g ground root bark was extracted for
15 h with 96% EtOH in a Soxhlet apparatus working under a pressure of 0.2 atm. After filtration, the
EtOH was evaporated in vacuo to dryness. The extracts were partitioned between EtOAc and 2% HOAc.
The aqueous layer was collected and brought to pH- 10 with ",OH and extracted with CHC1,-iPrOH
(9: 1). The CHC1,-iPrOH layer was collected, dried over anhydrous Na2S04, and evaporated in vacuo. The