Table 4. Antioxidant activities.

Compound	IC50(µg/mL)	Compound	IC50(µg/mL)
1	–	2 + 1	–
2	39.03 ± 0.64	2 + 3	–
3	–	2 + 4	–
4	130.68 ± 9.28	2 + 5	28.40 ± 0.16
5	25.93 ± 1.06	2 + 6	23.33 ± 0.77
6	17.62 ± 0.61	2 + 7	176.56 ± 3.62
7	–	5 + 6	3.37 ± 0.11
8	–	2+4+5	16.45 ± 0.04
9	–	2+4+5+6	13.59 ± 0.08
BHT	40.93 ± 0.89	1+2+3+4+5+6+7	32.60 ± 0.04

Notes.

“–” indicates inactive (IC₅₀ > 200 µg/mL).