Antimicrobial and Antioxidant Secondary Metabolites from Trifolium baccarinii Chiov. (Fabaceae) and Their Mechanisms of Antibacterial Action

Table 2

Antioxidant activities (EC₅₀ and GEAC in μg/mL) of extracts and some isolated compounds from Trifolium baccarinii.

Extracts/compounds	DPPH free radical scavenging activity (EC50)	Gallic acid equivalent antioxidant capacity (GEAC)
MeOH extract	^a	^a
EtOAc extract	^b	^b
n-BuOH extract	^c	^c
1	^d	^d
2	^e	^e
3	^e	^f
4	^d	^g
5	^f	^h
6	^e	^i
8	^g	^j
Vitamin C	^h	/

EC₅₀: equivalent concentrations of test samples scavenging 50% of DPPH radical; /: not determined. Data represent the of three independent experiments carried out in triplicate. In the same column, values earmarked by different superscript letters (a–j) are significantly different according to one-way ANOVA and the Waller-Duncan test ().