Bioactivities of Compounds from Elephantopus scaber, an Ethnomedicinal Plant from Southwest China

Table 1

The radical scavenging activity of 5 compounds from Elephantopus scaber.

Compound	Name	IC50 (mM)^a
1	Ethyl, methyl 3,4,3′,4′-tetrahydroxy-δ-truxinate	0.44±0.039
2	5-O-caffeoylquinic acid	0.96±0.096
3	Chlorogenic acid methyl ester	0.89±0.140
4	Deoxyelephantopin	NR
5	Isoscarbertopin	NR
𝟔^b	Trolox	1.33±0.187

 ^aThe inhibition was recorded at 10 min of reaction (ABTS method) and IC₅₀ value was measured using PROBIT model: PROBIT (𝑝) = intercept + 𝐵𝑋 (covariates 𝑋 are transformed using the base 10.000 logarithm). Each value corresponds to the mean and standard deviation of duplicates at five concentrations.
^bPositive control group.
NR: No reaction at the conditions discribed.