13567
Compound 5 showed , by 1 , 1 - diphenyl - 2 - picrylhydrazyl ( DPPH ) and beta - carotene systems , similar antioxidant activity when compared to compound ( 1 ) .
 Chemical: 1 , 1 - diphenyl - 2 - picrylhydrazyl; Chemical: DPPH; Chemical: beta - carotene
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: 1 , 1 - diphenyl - 2 - picrylhydrazyl; Chemical: DPPH; Chemical: beta - carotene