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The selective blockade of A2 adenosine receptor by DMPX ( 3 , 7 - dimethyl - 1 - propargylxanthine ) significantly enhanced cocaine - induced locomotor activity of animals .
 Chemical: adenosine; Chemical: DMPX; Chemical: 3 , 7 - dimethyl - 1 - propargylxanthine; 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: adenosine; Chemical: DMPX; Chemical: 3 , 7 - dimethyl - 1 - propargylxanthine; Chemical: cocaine