This paper describes the ultrasound-assisted extraction (UAE) of pristimerin from Celastrus orbiculatus. Methanol was the most effective for pristimerin extraction, followed by ethanol, ethyl acetate, n-butanol, and water. To optimize the conditions, the Box-Behnken design, a widely used form of
OBJECTIVE
To study the chemical constitutes of roots of Celastrus orbiculatus.
METHODS
The compounds were isolated by column chromatography and identified by spectroscopic methods including IR, MS and NMR.
RESULTS
Nine compounds were isolated and identified as sugiol (1), friedelane-3-one (2),