Table 1.

BBD and corresponding response values.

Run	X1 (%)	X2 (W)	X3 (min)	X4 (℃)	Y (mg/g)
1	75	400	40	60	35.89
2	95	300	40	60	26.24
3	85	350	40	60	36.31
4	75	350	30	60	32.52
5	85	350	30	50	33.12
6	85	400	30	60	36.27
7	75	300	40	60	27.90
8	75	350	40	70	30.87
9	85	300	40	50	33.25
10	85	350	40	60	36.39
11	75	350	50	60	31.60
12	85	350	50	50	35.91
13	95	350	50	60	27.32
14	75	350	40	50	35.45
15	85	350	50	70	26.87
16	85	350	40	60	36.36
17	85	350	40	60	34.98
18	85	400	50	60	25.34
19	95	350	30	60	31.69
20	85	350	30	70	36.33
21	95	350	40	50	30.43
22	85	400	40	50	32.42
23	85	300	50	60	29.75
24	85	400	40	70	35.02
25	85	350	40	60	35.22
26	95	350	40	70	30.85
27	85	300	40	70	26.33
28	85	300	30	60	26.11
29	95	400	40	60	26.20

Note: X₁ – EtOH concentration; X₂ – ultrasonic power; X₃ – extraction time; X₄ – extraction temperature; Y – total triterpenoids yield.