“…Among them compounds 2 , 5 , 6 , 8 , 9 , and 11 showed high scavenging activity for DPPH and ABTS radicals. Compounds 2 , [35] 3 , [36] 5 , [37] 8 , [38] 9 , [39] and 11 [40] were reported to exhibit high antioxidant activity in previous literature, but antioxidant activity for compound 6 was first revealed in this research.…”