17312
Water - soluble apple peel polysaccharides ( APP ) and apple flesh polysaccharides ( AFP ) were isolated from Pink Lady fruits , and their in vitro antioxidant capacities were characterised by DPPH ( ) , HO ( ) , and O ( 2 ) ( - ) systems , and ferric - reducing antioxidant power assay .
 Chemical: DPPH; Chemical: HO; Chemical: O ( 2 ) ( - ); Chemical: ferric
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: DPPH; Chemical: HO; Chemical: O ( 2 ) ( - ); Chemical: ferric