9856
DPPH ( . ) assay is a reliable method to determine the antioxidant capacity of biological substrates .
 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: DPPH ( . ) 
Answer:
 Chemical: DPPH ( . )