11208
In na i ve animals and the early , but not late , phase of the model , spinal administration of the alpha ( 2 ) - adrenoceptor antagonist atipamezole fully reversed this neuronal inhibition , whereas atipamezole administered alone revealed that endogenous noradrenergic inhibition was reduced in the late phase .
 Chemical: atipamezole; Chemical: atipamezole
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: atipamezole; Chemical: atipamezole