Table 5. Comparison of different extraction methods.

Item	Raw material	Extraction method	Extraction yield of AG (mg/g) (n = 3)	Extraction yield of DHQ (mg/g) (n = 3)
A	Wood flour	Soxhlet extraction 12 h with 40% ethanol solution	202.43±4.44	69.3±2.95
B	Wood flour	Soxhlet extraction 12 h with water	223.43±4.88	63.4±2.29
C	Wood chips	Soak 24 h with 40% ethanol solution at room temperature	164.22±4.28	56.6±1.94
D	Wood chips	Soak 24 h with water at room temperature	187.57±4.21	40.0±2.74
E	Wood chips	Reflux extraction 2 h with 40% ethanol solution	194.57±4.52	46.5±1.71
F	Wood chips	Reflux extraction 2 h with water	207.43±4.30	32.4±1.32
G	Wood chips	40% ethanol solution stirring extraction 8 h at 50°C	200.32±4.27	60.7±2.15
H	Wood chips	Water stirring extraction 8 h at 50°C	218.42±5.31	58.5±1.13
I	Wood chips	UAE 50 min with 40% ethanol solution	183.40±4.26	36.8±1.21
J	Wood chips	UAE 50 min with water	147.48±3.08	17.6±0.86