10965
Gene expression changes were determined by reverse transcriptase - polymerase chain reaction in rat livers treated with Targretin for 2 . 3 , 7 , and 21 days .
 Chemical: Targretin
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: Targretin