Table 1.

Trolox index values for hydroxy safflor yellow A (HSYA) and safflor yellow A (SYA). * p < 0.005 vs. HSYA; ° Data from literature [21].

Compound	Trolox Index
TROLOX	1.0 ± 0.2
HSYA	7.1 ± 0.3
SYA	2.1 ± 0.1 *
Quercetin °	10.7
Kaempferol °	10.2
Ferulic acid °	3.5