The radical scavenging activity of ABMP was conducted by using the method previously carried out by Ma, Chen, Zhu, & Wang(2011). Briefly, 2 mL of DPPH solution was added into 2 mL ABMP solution at a concentration ranging from 0 to 1.0 mg/mL. The mixture was placed in the darkness for 30 min and then the absorbance was measured at 517 nm.