8908
Core template modification , analysis of antiviral activity , physicochemistry and optimisation of properties led to the thiazole - imidazole 13 , that showed a good potency and pharmacokinetic profile in the rat .
 Chemical: thiazole; Chemical: imidazole
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: thiazole; Chemical: imidazole