21097
The 2 , 2 - diphenyl - 1 - picrylhydrazyl ( DPPH ) radical - scavenging activity , Fe ( 2 + ) - chelating activity , reducing power , and total phenolic content of the Sal B - decocted solutions did not change significantly after decoction in an aqueous solution .
 Chemical: 2 , 2 - diphenyl - 1 - picrylhydrazyl; Chemical: DPPH; Chemical: Fe ( 2 + ); Chemical: phenolic; Chemical: Sal B
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 2 , 2 - diphenyl - 1 - picrylhydrazyl, DPPH, Fe ( 2 + ), phenolic, Sal B 
Answer:
 Chemical: 2 , 2 - diphenyl - 1 - picrylhydrazyl; Chemical: DPPH; Chemical: Fe ( 2 + ); Chemical: phenolic; Chemical: Sal B