17619
In contrast , the dose - dependent respiratory depression and hyperlocomotion induced by morphine were not potentiated by gallein pretreatment .
 Chemical: morphine; Chemical: gallein
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: morphine; Chemical: gallein