20020
Acute behavioural effects of bupropion and naltrexone , alone and in combination , in non - deprived male rats presented with palatable mash .
 Chemical: bupropion; Chemical: naltrexone
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: bupropion; Chemical: naltrexone