24842
METHODS : We compared the displacement of radioligand binding to various mammalian CNS sites , acute stimulation of accumbens shell dopamine levels , and place conditioning in rats among cocaine and four BZT analogs with Cl substitutions on the diphenyl - ether system including two with carboalkoxy substitutions at the 2 - position of the tropane ring .
 Chemical: dopamine; Chemical: cocaine; Chemical: BZT; Chemical: Cl; Chemical: diphenyl - ether; Chemical: carboalkoxy; Chemical: tropane
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: dopamine; Chemical: cocaine; Chemical: BZT; Chemical: Cl; Chemical: diphenyl - ether; Chemical: carboalkoxy; Chemical: tropane