13810
These results implicated ( + ) - naloxone as a novel tool for studying mu - opioid receptor functions and suggest that ( + ) - naloxone may have therapeutic value to enhance clinical actions of opiate drugs .
 Chemical: ( + ) - naloxone; Chemical: ( + ) - naloxone
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: ( + ) - naloxone; Chemical: ( + ) - naloxone