4695
Neither idazoxan nor agomelatine significantly reduced premature responding , suggesting a lack of efficacy at the doses tested .
 Chemical: idazoxan; Chemical: agomelatine
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: idazoxan; Chemical: agomelatine