24478
For conditioning , subjects were administered U62 , 066 prior to confinement to one side of the chamber and saline prior to confinement to the other side for a total of four pairings .
 Chemical: U62 , 066
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: U62 , 066