19582
Compound 11 , a potent and selective ALK5 inhibitor , exhibited good enzyme inhibitory activity ( IC50 = 4 . 8 nM ) as well as inhibitory activity against TGF - beta - induced Smad2 / 3 phosphorylation at a cellular level ( IC50 = 17 nM ) .
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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:
 None