21640
We did observe effects of AG490 on STAT3 - signaling at 4 h , while AG490 - mediated changes in brain activity of inflammatory transcription factors at 8 h were not significant .
 Chemical: AG490; Chemical: AG490
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: AG490; Chemical: AG490