22190
In vitro study , radical scavenging IC50 values of TFs were 7 . 33 +/- 0 . 093 , 9 . 24 +/- 0 . 100 , 154 . 33 +/- 11 . 38 and 256 . 7 +/- 4 . 86 mu g / ml for DPPH , ABTS , hydroxyl radicals , and superoxide anion , respectively .
 Chemical: DPPH; Chemical: ABTS; Chemical: hydroxyl; Chemical: superoxide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: DPPH; Chemical: ABTS; Chemical: hydroxyl; Chemical: superoxide