25367
Friedelin showed very good scavenging effect on DPPH ( IC50 21 . 1mM ) , hydroxyl ( IC50 19 . 8mM ) , nitric oxide ( IC50 22 . 1mM ) and superoxide ( IC50 21 . 9mM ) radicals .
 Chemical: Friedelin; Chemical: DPPH; Chemical: hydroxyl; Chemical: nitric oxide; 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: Friedelin; Chemical: DPPH; Chemical: hydroxyl; Chemical: nitric oxide; Chemical: superoxide