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. 2016 Nov 23;16:476. doi: 10.1186/s12906-016-1453-x

Fig. 3.

Fig. 3

Extraction 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)