1253
The free - radical scavenging activity of the extracts was also determined by the 2 , 2 - diphenyl - 1 - picryhydrazyl ( DPPH ) assay .
 Chemical: 2 , 2 - diphenyl - 1 - picryhydrazyl; Chemical: DPPH
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 - picryhydrazyl, DPPH 
Answer:
 Chemical: 2 , 2 - diphenyl - 1 - picryhydrazyl; Chemical: DPPH