To study the antioxidant activities of Siratia grosvenorii,DPPH,ABTS,FRAP,and ORAC methods were used ot determine the abilities of six different mogroside compounds to scavenge radical and ferric reducing antioxidant power.The results showed that the six mogroside compounds all had antioxidant activities,but it was not consistent among different systems. MogrosideⅡA2exhibited the strongest radical-scavenging and iron ion-reducing activities,followed by MGV and MGVI. However,the antioxidant activities of MG ...