6632
The AA % of the tea products was determined using a 2 , 2 ' - diphenyl picrylhydrazyl ( DPPH ) radical assay method .
 Chemical: 2 , 2 ' - diphenyl picrylhydrazyl; Chemical: DPPH
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: 2 , 2 ' - diphenyl picrylhydrazyl; Chemical: DPPH