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Although the new compounds were not active , phenylpropanoylquinic acid derivatives were revealed as radical scavengers in D . ruyschiana .
 phenylpropanoylquinic acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 phenylpropanoylquinic acid