27210
Chemistry has been developed to access both imidazo [ 1 , 2 - a ] pyrazines and imidazo [ 1 , 2 - c ] pyrimidines .
 Chemical: imidazo [ 1 , 2 - a ] pyrazines; Chemical: imidazo [ 1 , 2 - c ] pyrimidines
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 ] pyrazines; Chemical: imidazo [ 1 , 2 - c ] pyrimidines