25944
A randomized , double - blind , placebo - controlled crossover study of alpha 4 beta 2 * nicotinic acetylcholine receptor agonist AZD1446 ( TC - 6683 ) in adults with attention - deficit / hyperactivity disorder .
 Chemical: acetylcholine; Chemical: AZD1446; Chemical: TC - 6683
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: acetylcholine; Chemical: AZD1446; Chemical: TC - 6683