18537
2 - Arylpyrazolo [ 4 , 3 - d ] pyrimidin - 7 - amino derivatives as new potent and selective human A3 Adenosine receptor antagonists .
 Chemical: 2 - Arylpyrazolo [ 4 , 3 - d ] pyrimidin - 7 - amino; Chemical: Adenosine
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: 2 - Arylpyrazolo [ 4 , 3 - d ] pyrimidin - 7 - amino; Chemical: Adenosine