Fig. 3From: Comparative analysis of four terpenoids in root and cortex of Tripterygium wilfordii Radix by different drying methodsExtraction efficiency of terpenoids in Tripterygium wilfordii Radix with different extraction solvent (U1: ultrasonic-methanol, U2: ultrasonic-ethanol, U3: ultrasonic-ethyl acetate, R1: reflux-methanol, R2: reflux-ethanol, R3: reflux-ethyl acetate)Back to article page