The superoxide radical scavenging effects were examined [11]. Briefly, extract (1 ml) was added to 1 ml of 50 μM NBT solution and 1 ml of 468 μMNADH, and a 1ml aliquot of 60 μM PMS reaction mixture. After 5min, absorbance was read at 560 nm. The inhibition percent and IC50 valueswere calculated.