17419
Prodrugs have been synthesized resulting in IC50 values as low as 3 . 8 mu M for Pf grown in cell culture , up to 25 - fold lower compared to the parent compounds .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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