19346
Compounds 11 , 12 and 18 showed significant PTP1B inhibitory activity with IC50 values of 1 . 773 , 1 . 875 and 2 . 286 mu M , respectively .
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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