12335
D3 receptors agonist ( PD128907 ) induced a CPP only at 1 mg / kg , comparable to that of cocaine .
 Chemical: PD128907; Chemical: cocaine
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: PD128907; Chemical: cocaine