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In particular , compounds 6 , 8 , 14 , 16 and 29 were found to be significantly more active than chloroquine against the chloroquine - resistant strains ( W2 clone ) of P . falciparum .
 chloroquine, chloroquine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 chloroquine, chloroquine