1727
Together , the data suggest that sigma2 receptor antagonists have the potential to attenuate some of the behavioral effects of cocaine , and further development of more selective , high affinity ligands are warranted .
 Chemical: cocaine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: cocaine