13996
Five new series of imidazo [ 1 , 2 - a ] pyridines carrying biologically active pyrazoline ( 4a - e ) , cyanopyridone ( 5a , b ) , cyanopyridine ( 6a - f ) , 2 - aminopyrimidine ( 7a - f ) and pyrimidine - 2 - thione ( 8a - d ) systems were designed and synthesized as prominent anticonvulsant agents .
 Chemical: imidazo [ 1 , 2 - a ] pyridines; Chemical: pyrazoline; Chemical: cyanopyridone; Chemical: cyanopyridine; Chemical: 2 - aminopyrimidine; Chemical: pyrimidine - 2 - thione
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: imidazo [ 1 , 2 - a ] pyridines; Chemical: pyrazoline; Chemical: cyanopyridone; Chemical: cyanopyridine; Chemical: 2 - aminopyrimidine; Chemical: pyrimidine - 2 - thione