22492
Certain DIF - 3 derivatives , such as butoxy - DIF - 3 ( Bu - DIF - 3 ) , at micro - molar levels strongly suppressed both the infection rate and growth of T . cruzi in HT1080 cells and exhibited little toxicity for HT1080 cells .
 butoxy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 butoxy