27209
Potency switch between CHK1 and MK2 : Discovery of imidazo [ 1 , 2 - a ] pyrazine - and imidazo [ 1 , 2 - c ] pyrimidine - based kinase inhibitors .
 Chemical: imidazo [ 1 , 2 - a ] pyrazine; Chemical: imidazo [ 1 , 2 - c ] pyrimidine
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 ] pyrazine; Chemical: imidazo [ 1 , 2 - c ] pyrimidine