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The antioxidative activity of the extract , the anthocyanin - rich fraction ( AF ) was determined by 1 , 1 - diphenyl - 2 - picrylhydrazyl radical and ferric - reducing ability of plasma along with resveratrol as a reference .
 Chemical: anthocyanin; Chemical: 1 , 1 - diphenyl - 2 - picrylhydrazyl; Chemical: ferric; Chemical: resveratrol
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: anthocyanin; Chemical: 1 , 1 - diphenyl - 2 - picrylhydrazyl; Chemical: ferric; Chemical: resveratrol