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A homology model of the DEN - 2 NS2B / NS3 protease ( using West Nile Virus NS2B / NS3 protease complex , 2FP7 , as the template ) was used as the target and pinostrobin , a flavanone , was used as the standard ligand .
 Chemical: pinostrobin; Chemical: flavanone
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: pinostrobin; Chemical: flavanone