. 2019 Mar 14;24(6):1022. doi: 10.3390/molecules24061022

Table 2.

DPPH scavenging activity of silymarin and flavonolignans.

Compound	IC₅₀ (µM)	IC₅₀ (mg/L)
SB	527.86 ± 9.75 ^#,†	254.43 ± 4.70 *^,†
DHSB	26.25 ± 1.75 ^†	12.60 ± 0.84 *^,†
ISB	251.93 ± 6.56 ^#,†	121.43 ± 3.16 *^,†
SD	52.12 ± 1.93 ^#,†	25.12 ± 0.93 ^†
SC	38.05 ± 2.14 ^#,†	18.34 ± 1.03 *^,†
SM	-	25.38 ± 0.97 ^†
QE	6.75 ± 0.87	2.04 ± 0.26

Silybin (SB), dehydrosilybin (DHSB), isosilybin (ISB), silydianin (SD), silychristin (SC), silymarin (SM), quercetin (QE). Data are expressed as mean ± SEM from four independent experiments. The IC₅₀ (µM) of SM cannot be estimated. ^# Significantly different from DHSB at p = 0.05; * significantly different from SM at p = 0.05; ^† significantly different from QE at p = 0.05.